Status of Trim Enabler in Yosemite

Status of Trim Enabler in Yosemite
October 17, 2014 Oskar

Update!

Trim Enabler 3.3 is out, with improved compatibility with OS X Yosemite.

Does Trim Enabler work in OS X Yosemite?

The answer is Yes, but due to new security features in Yosemite, enabling Trim can cause problems with your OS X installation.

Make sure to read this document about Trim Enabler and Yosemite before enabling Trim on Yosemite:

Link: FAQ and support for Trim in Yosemite

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103 Comments

  1. mike 2 years ago

    Thanks for this post. I was hesitant to enable 3.2.6 on 10.10. So please do keep us posted. I think you got quite a few users waiting for this very relevant information. And if you can safe them from running into trouble and having to re-install 10.10, that is well worth the effort of investigating.

    Hope 3.2.6 works, but please do let us know 🙂

    • Wao 2 years ago

      3.2.6 DO work fine. I used 3.2.6 to enable TRIM on Yosemite final release version.

      Just need reboot twice. First time for disabling the kext limitation, and second time for re-enabling TRIM.

    • philip castleton 2 years ago

      Installed Yosemite and downloaded 3.3 Trim. When switching on Trim, disabled kext signing when asked, then switched on Trim and rebooted. Then got the grey screen and ‘stop’ icon!! I have reinstalled Yosemite. What do I do this time?!

      • Oskar Groth 2 years ago

        As the warning message says, you must reboot after disabling kext-signing.
        You must not turn on Trim before this.
        So in total, you will reboot 2 times.

  2. myownentity 2 years ago

    I have updated to retail Yosemite about two hours ago with Trim enabler turned on, and since I restart my MBA I have the boot failure problem. I have tried all command solutions posted on your website, but nothing is working. I would really appreciate if someone can shed some light on this issue. Cheers.

  3. Mase 2 years ago

    I updated to retail too, with Trim enabled (but not with Trim enabler, but with the terminal commands), since the update the mac is working, but trim is now disabled…

  4. emori 2 years ago

    TERM

  5. Philipp 2 years ago

    Re-enabling after Yosemite upgrade worked just fine.

  6. Buikit 2 years ago

    I use the current new version software on MacBook Pro 13″ Mid 2012. First I enabled the button but it didn’t work after reboot. But it works when I clean the PROM.

    *The SSD is Micron MX100 512GB.

  7. Dimitrios Kotanidis 2 years ago

    I have installed the final version of yosemite and the latest update of trim enables and didnt work at beginning. Stay stucked at stop boot screan and followed tha isntruction with boot cmd+r and terminal, just typed the command and after 3-4 tries i finally un stucked and booted again in yosemite with trim condition enabled…

    There must came an update…something changed there in the final version…thanx regard and congratulations for your nice work…i donate to you cause i believe you done a great job…

  8. macinmac 2 years ago

    Update.

    I had the same problem, path not recognised and TE not enabled..what I did:

    Disabled it, with kext and everything, then re-download TE from here, and re-enabled with all the things, kext, reboot, and enable TE and reboot again; now the patch is ACTIVE and TRIM ENABLER is ACTIVE.
    I’m 100% sure that the app has to be “renewed” somehow and re-enabled, to make it work as new.
    Hope that helps.

  9. Philipp 2 years ago

    Update: Seems shutdown (e.g. at reboot) takes “long”. Feels like a minute, is probably less, but much more than the expected few seconds.
    (Black screen, partially with white “busy” symbol.)
    Seems to happen at every reboot today (a few, for SW updates) after I installed TE on Yosemite.

  10. Eidooc 2 years ago

    After installing Yosemite last night, TE was removed automatically because i was running an older version of TE Mavericks. I was hesitant to install/enable TE when i saw this post. After reading @macinmac post, i took the plunge. What i did:

    1. installed my old version (3.1.3) on Yosemite, but ***DO NOT ENABLE***.
    2. “Allow apps downloaded from: Anywhere” in Settings > Security & Privacy > General
    3. Check for updates in TE
    4. Download and install TE
    5. Enable TE
    6. Reboot when asked by TE
    7. Log in to Yosemite
    8. Enable TE again
    9. Reboot
    10. Log in to Yosemite
    11. TE was enabled
    12. Done.

    I hope this helps.

  11. Henry Wakeling 2 years ago

    I am also unable to boot after enabling trim post Yosemitie upgrade – I have followed the nvram workaround and the Reset trim instructions but still no joy – help please?

  12. Luca 2 years ago

    Hello,
    updated to yosemite, I had trim enabled before not by using your program but by command line.
    I first tried that again, but it resulted in no boot, so I tried your method and it worked, by going into recovery I’ve been able to load the kext, I don’t know if it’s possible to reenable kext-signing by putting kext-dev-mode=0 but doing this doesn’t seem to affect it.

    I came to the conclusion that probably giving the commands to patch the kext in recovery can result in a functioning system after one reboot

  13. Wao 2 years ago

    I’m on Yosemite with v3.2.6. It WORKs FINE.

    Thanks Oscar for his awesome work!

  14. Jere Krischel 2 years ago

    Seemed to work okay on my MacBookPro9,1, running two SSDs with a DataDoubler.

    Doesn’t work okay on my Macmini6,2 – tried all the kext magic in recovery mode several times, and still stop sign during boot. Got back to working by reinstalling Yosemite from recovery mode.

  15. James Cherry 2 years ago

    Disaster for me installed Yosemite, updated trim enabler, rebooted to disable kext but now stuck with white screen of death and flashing question mark folder. Attempted recovery but drive is not recognised in disk utility and seems to be dead. Hope this is a software thing on not a dead drive. Please help ASAP

  16. mazikeen 2 years ago

    Just did theYosemite install on a MacBook Pro 13″ Mid 2012 w/ a Samsung EVO 750.

    As expected, as soon as it finished installing, TRIM warning came up about kext drop promoting one restart. Once everything was back up, activated TRIM and rebooted again. Everything worked perfectly. TRIM is enabled in System Info under SATA as well.

    Thanks so much for getting this update out in time for the Yosemite launch. I know I appreciate it and my clients will as well.

  17. Bircher 2 years ago

    First: trim enabler is just a great thing – thank you!

    I got the same issue: the installing-process just worked fine. I got into my account whereas trim enabler 3.2.6 stated not to be enabled. I followed the enabling-process, but enabling was not possible, then I got white sceen with symbol like ø. Tried the commands but didn’t get any effect. Waiting for help!
    Perhaps this for more info: I didn’t turn off trim enabler 3.2.6 before I downloaded Yosemite. Got Samsung 840 Pro, where I had 10.9.5 installed.

  18. OpenThreads 2 years ago

    OK. Before I proceed, can I get some advice? I have been using Trim Enabler 3.2.6 on Mavericks. I don’t know what all this talk about kext is. Anyway, I’ve disabled TRIM and rebooted to get ready for Yosemite install.

    If I install Yosemite, will I be able to run 3.2.6 Trim Enabler and turn on TRIM support successfully without messing up my system? Oh: I have Macbook Pro (17-inch, Late 2011) with Crucial M4-CT512M4SSD2

    Thanks!

  19. Markus 2 years ago

    I tried installing Yosemite and then re-enable Trim.. it worked fine for a couple of reboots, but as i installed Air-foil again and rebooted, it wouldn’t start any more and went into the grey screen with a stop sign, after trying to load something with a load bar only going 1/3 of the way or so.

    Could not get the terminal workaround to work tho
    (this one):
    “nvram boot-args=kext-dev-mode=1
    cd /Volumes/YourDisk
    touch System/Library/Extensions
    kextcache -prelinked-kernel System/Library/Caches/com.apple.kext.caches/Startup/kernelcache -K System/Library/Kernels/kernel System/Library/Extensions ”

    The cd /Volumes/YourDisk wouldn’t find my disk (in this case Markus HD), so had to do a re-install of OSX Mavericks, and staying with that for now until a perm fix 🙂

  20. Kimatel 2 years ago

    Applied TE 3.2.6 successfully. I have Mac Pro “Early 2009”, SSD Crucial 256 Go (M550).
    “Le patch est actif et le Trim aussi. Tout à l’air parfait.”

    One question: is that possible, if necessary later, to reverse this, I mean, how to re-enable the kext signing?

    Thank you, Cindori Software!

  21. Mathias 2 years ago

    Hi, i’ve done a fresh install of 10.10 from USB. You said an update will be available tomorrow 18th? Correct? Should i wait? 🙂

  22. Alex Martin 2 years ago

    I’m holding my Samsung 850 Pro without TRIM on Yosemite for the moment on my mid 2010 Macbook Pro 13. I ended reading here and I saw that Oskar has been trying to help all those (crazy like me) early adopters of the new OSX and third party SSD’s. I’ll wait for that update coming. Thanks so much.

  23. Riad 2 years ago

    Hi Oskar,
    I have mb pro 13inch late 2011 with Samsung Evo 1tr SSD drive with Trim Enabler 3.2.2
    I now updated the Yosemite OS, when I checked after update it must of disabled the 3.2.2 Trim Enabler automatically. So I went ahead and downloaded Trim Enabler from the site and followed procedure to disable Kext and reboot etc… All went well so far and showing (TRIM Support:Yes)
    The question I have, I’m seeing 2 Trim Enabler application images in launchpad, the new one and the old 3.2.2 as I tried to delete and drag it to trash nothing happens and I only have the new Trim Enabler in application folder.. Any suggestion on why it’s still in launchpad and how can I delete the 3.2.2 ??
    Thanks as always!

    • Oskar Groth 2 years ago

      I really have no idea, I don’t think it’s a problem related to Trim Enabler.
      I googled “duplicate icons launchpad” and got some results.
      Have you tried those solutions?

    • Jens 2 years ago

      Hi!

      I had the same problem and found the old app in /Incompatible software.
      Toss it in the trash, try opening it using Launchpad.
      If you now open Launchpad again, it will show a question mark on top of the App.
      Press and hold, click x to uninstall.

      • Jens 2 years ago

        Correction, last row: Not uninstall, but delete app short cut in Launchpad.

  24. Firdaus Ishak 2 years ago

    Hi everyone,

    TE 3.2.6 works! To those who are trying to install OSX Yosemite, can try this method.

    1. After finish downloading Yosemite, please DON’T run the installation first!
    2. Turn OFF the TE. DON’T re-nable TE yet.
    3. Reboot.
    4. Turn ON TE. It will ask about “kext-signing”. PROCEED.
    5.Reboot.
    6. Turn ON TE again.
    7. Reboot.
    8. Finish

    Now if you’re lucky, the TRIM will be enabled. You can check on the system information.

  25. chris974 2 years ago

    @Firdaus Ishak
    I don’t understand your process. After download Yosemite and no run the installation, you are again in Mavericks.
    After three reboots you are always in Maverick and you run the Yosemite’s installation after and now all is clear for you. The last reboot will be able to run Yosemite correctly.

    Nota: Excuse me for my english sir, i’m french Mac user from Reunion’s island

    • Firdaus Ishak 2 years ago

      Sorry sir. My mistake. After reboot in step 3, you run the installer of the OSX Yosemite. After installed the OSX Yosemite, then you can continue step number 4. Thanks.

      • chris974 2 years ago

        Thank’s a lot sir.
        I’ll going to make the update as the Ulrich’s method.
        Thank you very much

        Bests regards !

  26. vs65r 2 years ago

    Hi,

    What I did.
    Disable TE
    Install Yosemite
    Launch TE, who wants to disable “kext” –> Click Proceed
    Mac reboots
    Launch TE again, enable trim
    Mac reboots
    Trim is enabled 🙂

    It worked for me.

    • Sergio 2 years ago

      This worked for me too and now Trim is enabled in Yosemite. 🙂

      Thank you very much!

  27. Ulrich 2 years ago

    Just in case you think about to udpate.

    I had Mavericks and updated successfully to Yosemite.

    1. Disabled and uninstalled Trim Enabler in Mavericks

    2. Installed Yosemite, rebooted once, did a TM Backup

    3. Downloaded TE 3.2.6 and installed it as the process says.

    4. Done. Works.

    I am on a MB late 2008 (alu) with a Samsung 840 pro.

  28. Oskar Groth 2 years ago

    Read below

  29. Oskar Groth 2 years ago

    Read below

  30. Oskar Groth 2 years ago

    The post was just updated.
    For anyone reading this: The above comments was made before the Trim Enabler 3.3 update was pushed out. You should not need to follow the various workarounds posted by users if you download the 3.3 version.

    • Riad 2 years ago

      Hi Oskar, Sorry for the repeat question, I’m still looking for a solution on why I can’t delete the old TE version.

      I have mb pro 13inch late 2011 with Samsung Evo 1tr SSD drive with Trim Enabler 3.2.2
      I now updated the Yosemite OS, when I checked after update it must of disabled the 3.2.2 Trim Enabler automatically. So I went ahead and downloaded Trim Enabler from the site and followed procedure to disable Kext and reboot etc… All went well so far and showing (TRIM Support:Yes)
      The question I have, I’m seeing 2 Trim Enabler application images in launchpad, the new one and the old 3.2.2 as I tried to delete and drag it to trash nothing happens and I only have the new Trim Enabler in application folder.. Any suggestion on why it’s still in launchpad and how can I delete the 3.2.2 ??
      Thanks as always!

      • chris_974 2 years ago

        Hi Riad,

        My iMac late 2009 with SSD Samsung 840 EVO 1To works wonderfully without using trim enabler 3.3.
        Why, did you think ?
        Because, SSD Samsung 840 EVO use by default the garbage collector (it’s the same thing that TRIM). You can uninstall Trim Enabler, my iMac starts in 10s and stops in 5s.
        I’ve used trim enabler 3.3 under Mavericks 10.9.5 and i noticed that my iMac worked less fastest than now.
        So, my experience lets me to tell you, if you use a same SSD or equivalent, don’t use trim enabler immediately, make the update to yosemite, state that the new OS works normally and fast, wait for a new update of yosemite “10.10.01″ with trim activated by default for SSD’s third party.

        Bests regards

        Nota Bene : If you are sceptical, search in google Samsung SSD 840 EVO and garbage collector and read comments’s xbitlabs.com

    • psilvester44 2 years ago

      Oskar, Firstly many thanks for all your doing, I think you are providing a great service.

      My Mac is running the latest Yosemite 10.10 now, I previously ran the beta software.

      Can I ask a simple question. If we enable your Trim software and allow it to disable Kext and just leave it like that, will there be any issues with upgrades or reboots? If thats all that is needed I would go for that or, is it possible for Text Controller to automatically close when the Mac reboots and so that there wouldn’t ever be issues with the grey screen? and it would be up to the individual to remember to re enable it once rebooted.

      Kind regards

      Paul

  31. RogerB 2 years ago

    Hi all there!

    I just installed Trim Enabler Vers. 3.3 and it worked just flawless! Great! A very respectful thank you to you, Oskar!

  32. Alex Martin 2 years ago

    TE 3.3 working on my “mid 2010” Macbook Pro 13 + Samsung 850 Pro SSD. Thanx Oskar!

  33. Antonios 2 years ago

    TE 3.3 asking me always to disable kext after reboot, so I cannot enable Trim (Mac Pro (Early 2009))
    Any suggestion ?

    • Oskar Groth 2 years ago

      Try shut down the computer completely.
      If it does not work, tell me what you get when running this in terminal:
      nvram boot-args

      • Antonios 2 years ago

        Hi,
        shutting down doesn’t work

        nvram: Error getting variable – ‘boot-args’: (iokit/common) data was not found

        • Oskar Groth 2 years ago

          Sounds really strange. Are you logged in as an administrator?
          You could try the Uninstall button in the settings, and redownload from the website.
          If that does not work, you can set it yourself by running:
          sudo nvram boot-args=kext-dev-mode=1

          • Antonios 2 years ago

            I’m logged in as an adminstrator,
            uninstalled and installed again, same thing
            sudo nvram boot-args=kext-dev-mode=1 and after rebooting same thing !!!
            strange
            On my macbook pro everything worked just flawless

          • Riad 2 years ago

            Oskar, I guess some of us are not worthy of an answer, I asked you twice above but no reply to my issue.

        • OpenThreads 2 years ago

          FYI, both my Macbook Air (late 2012) with retail Yosemite and my Mac Mini (2011) with Mavericks both return the same with the nvram boot-args command:

          nvram: Error getting variable – ‘boot-args’: (iokit/common) data was not found

  34. Armin 2 years ago

    Hi

    I get this error when i try to disable kext sign “nvram: Error getting variable – ‘boot-args’: (iokit/common) data was not found”

    I already have kext-dev-mode=1 and i could enable trimenabler in beta but in final i got that error. And each time i proceed it restart my mac and when i boot up i get the patch is not active and trim is not enable.

  35. David 2 years ago

    I followed these instructions to the Tee and bricked my SSD. Well, almost. I had to remove it, connect it to USB and reformat it. Samsung SSD, 840 Pro, Late 2011 Mac + Yosemite

    • chris_974 2 years ago

      Hi David,

      My iMac late 2009 with SSD Samsung 840 EVO 1To works wonderfully without using trim enabler 3.3.
      Why, did you think ?
      Because, SSD Samsung 840 EVO use by default the garbage collector (it’s the same thing that TRIM). You can uninstall Trim Enabler, my iMac starts in 10s and stops in 5s.
      I’ve used trim enabler 3.3 under Mavericks 10.9.5 and i noticed that my iMac worked less fastest than now.
      So, my experience lets me to tell you, if you use a same SSD or equivalent, don’t use trim enabler immediately, make the update to yosemite, state that the new OS works normally and fast, wait for a new update of yosemite “10.10.01″ with trim activated by default for SSD’s third party.

      Bests regards

      Nota Bene : If you are sceptical, search in google Samsung SSD 840 EVO and garbage collector and read comments’s xbitlabs.com

  36. Tom 2 years ago

    Hey,
    I first encountered the “barred circle” thing, because I didn’t notice that I should not enable TRIM with Trim enabler in Yosemite without disabling kext-signing! After reinstalling OSX (commands didn’t work in my hands) I then was able to activate TRIM according to your instruction.
    Thanks for your effort in making this feature available also for less experienced users!

    – unfortunately I could not find how to disable kext-signing on your side

    all the best & keep it up!

  37. miguel 2 years ago

    TE wasn’t working even after upgrade.
    Disable kext with TE 3.3 + uninstall TE + reboot + reinstall TE + Enable Trim + reboot = corrected the issue.

    All the best & thanks for such software

  38. Pierre Martin 2 years ago

    Hi,
    I think we could start a petition asking apple to reconsider the way Yosemite (and older OS) handle the trim command.
    OS X is the last OS to not support it : so let us activate trim for “non apple” sad drive, and in the same time let us use a safer OS with security like kext-signing.
    Best regards from a french user of trim enabler since it’s launch.

  39. Juan Villegas 2 years ago

    Hello hello…

    I have no idea how Trim works, buy what I know is that I want it working on my disks… but, I also want my computers working fine and without gray screen warnings…

    Here is my question… would Trim enabler do its job if I enable it for some hours/days every 3/4 months?

    Is it like disable the antivirus on windows, and enable it every 2 months, clean the computer and disable it again? Or Trim enabler doesn’t work on that way?

    Thank you in advance for your comments… and thank you Oskar for this great software.

  40. René Andritsch 2 years ago

    Dear Oskar,

    if Apple allowed third party plugin/extension developers to have a legit way of permitting TRIM enabling would you apply for a license to get the signing certificate for Yosemite or upcoming releases?

    Best, René

    • Oskar Groth 2 years ago

      Absolutely. But currently Apple does not allow any developer to make AHCI SATA features using the native driver stack. Not even disk manufacturers like Samsung, Corsair etc.

  41. Dave 2 years ago

    I understand at this point it is not possible to activate TRIM-enabler without turning off Kext Signing.
    Now my idea to bypass is this issue, and hopefully you can answer the following question. Can I create a partition with Parallels to run the older Mavericks OS, to run TRIM enabler or by using Apple’s Bootcamp program?

  42. Ronnie 2 years ago

    I’m wondering if you even need to install Trim in Yosemite. When using Mavericks, I saw a dramatic drop in performance when I didn’t use Trim Enabler. But since I’ve been using Yosemite without Trim Enabler for the past week, I’ve been seeing the increased performance that I got before when I used Trim Enabler with Mavericks. I’m running the Blackmagic Disk Speed Test, and I’m getting outstanding results. Is it possible Apple has this built in now?

  43. samuel 2 years ago

    What is the real danger in enabling TRIM on Yosemite?? I use my MBP only for day-to-day activities such navigate, download and watch movies and such. Im a standard user with no skills in programming, but smart enough to play safe.

  44. Jeff 2 years ago

    Hey,

    Sorry if this comment is elementary, but I barely understand how this TRIM feature works after installing my SSD into my comp. I randomly decided to check if TRIM was on since I have not looked at the app in months since upgrading to my SSD and I found it was off. I have now been reading about this whole ordeal and I’m guessing that my TRIM had, luckily, been turned off when I upgraded to Yosemite because I didn’t have any problems with my upgrade.

    I wanted to know how turning on TRIM will affect me negatively. Does that mean when I do app upgrades using the apple store, I have to disable the TRIM first? Can someone give me examples when I would have to re-enable the kext (turn the TRIM button off) so that I do not get an error with my computer?

    Thanks for understanding my lack of understanding.

  45. Alessandro 2 years ago

    Ok, the latest version is working fine! I follow this steps:

    1 Upgrade to 10.10
    2. delete old version of TE
    3. Run Disk utility to fix permissions on disk (run until fix all permissions)
    4. Change the Security/Privacy settings to allow apps download from: “Anywhere” -( I don’t know if this is really necessary)
    5. download/install the new version of TE
    6. Execute and enable Trim
    7. Restarts
    8. Done;

  46. Den 2 years ago

    Hi! I just upgrade to 10.10.1. it’s does function or i have to wait?

    • Oskar Groth 2 years ago

      It works like on 10.10

      • Robert 2 years ago

        I don’t know if it was a fluke but I did have a problem where it asked to re-disable kext (which it has never done in any other OS X 10.10 Beta update since disabling it in the first beta). It appears to have worked to re-enable TRIM. Thanks for a great app.

  47. Your style is so unique compared to other people I’ve read stuff from.
    Thanks for posting when you have the opportunity, Guess I will just bookmark this web site.

  48. RogerB 2 years ago

    10.10.1: no problems with trim enabler 3.3 on MBP i7 late 2012 (2 HDs).

    • Vic 2 years ago

      Is anyone having issues with 10.10.1 trim enabled with a macbook pro early 2011 (13 inch), someone who has changed their hard drive with an non-Apple certified HDD or SSD?

      Vic

  49. Adam 2 years ago

    I’m having a late 2011 macbook pro, and I’m facing a quite one hell of a problem. after I have updated Yosemite to 10.10.1, I’m facing one serious issue. after I have enabled Trim ( of course after disabling next signing ). I restart the Mac and everything seemed fine no matter how many times I restart, everything goes just fine, Untill!! the moment where I turn it off, when I turn it on back again, the booting bar takes a while and for unknown reason it enters safe mode! after that I restart the Mac and the circle with slash again!!. I’m so desperate for a solution, so please anyone help.

  50. Brian Beck 2 years ago

    Updated to 10.10.1 today, using the m500 ssd drive from Crucial, complete lockup. tries to boot to about 50% the white screen of death, can’t boot to safe mode, only single user mode, repaired disk permissions, was able to put macbook pro 2011 into target disk mode from other mac, repaired permissions from there, finally was able to boot into normal mode and turn trim off, reinstalling os, going to leave trim off for now.

  51. abd 2 years ago

    Working great on 2011 and 2012 MBP and updated to 10.10.1:
    1. pre-update: disable trim support/ and enable kext signing with TE
    2. update to 10.10.1
    3. re-enable Trim/disable kext signing with TE
    4. 🙂

  52. kk 2 years ago

    Thanks for the confirmation abd. I’ve been wondering if anyone has had luck with 10.10.1. and TE 3.3!

    • alien 2 years ago

      I am using 10.10.1
      the trick is after trim asking you to reboot at second times, choose to shutdown your mac than you should wait about few minute after you mac really off.
      after that just simply turn it back on.
      I hope it help

      • Moridin 2 years ago

        Not working for me. Could you post an exact guide, step by step?

  53. psilvester44 2 years ago

    Has anyone tried updating a samsung 840 Evo Drive with the new firmware yet? And does having Trim enabler on and Kext Signing turned off effect it in any way? or is this all done at a bios sort ofe level so the programmes dont come into it?

    I would appreciate any thoughs as thanks to you guys my macbook pro is humming like a bird.

    paul

  54. Rich 2 years ago

    I loaded yosemite and my system wouldn’t boot, but I could go into single user mode and fsck and mount the drive just fine. I went looking for the issue I was having and found the enabling trim for non apple SSD’s and this has solved my issue. I bought the 512GB SSD when I first bought my MacBookPro about 3 years ago. It has worked flawlessly which is why I went looking for a solution. I ran into one variation in your website instructions. When I trie to do the nvram boot-args I got an error message. I went forward anyway and put in the second nvram command and rebooted and followed the rest of the instructions and everything worked fine. Thanks so much for posting this information. I am incredibly disappointed in Apple for this proprietary SSD requirement that harmed folks using their purchased systems. Hey Apple who do you think you are Steve Balmer or Bill Gates. Give me a break and stop trying to protect market share by hurting your loyal followers.

    If this keeps up I will go back to running LINUX on a standard PC platform and use Virtual Box to run the handful of applications my company requires me to run under a windows virtual box instance.

  55. surfcow 2 years ago

    Hi there,
    Running Yosemite. Volumes are not encrypted.
    Currently can not boot, getting the stop-sign on the boot screen.

    In Recovery mode.

    On thie page: http://www.cindori.org/trim-enabler-and-yosemite/
    Followed these instructions “Recovering from stop sign on boot screen” – did not work. Still boots to stop sign.
    Followed these instructions “Reversing any changes by Trim Enabler” – did not work. Still boots to stop sign.

    Tried to re-install the OS from Recovery mode – no luck. It says I need more space, must empty trash.

    Does anyone know how to empty the trash from the terminal in recovery mode?

    thank you,

    surfcow@yahoo.com

  56. Eduardo 2 years ago

    It won’t let me go to recovery mode using cmnd+R, so I’m stuck with the gray stop sign. Any ideas?

  57. Cynthia 2 years ago

    Need to upgrade to more contemporary OS (running 10.6.8) for newer software but want to keep old Creative Suite which will not run on Maverick or Yosemite. Was guided to an SSD card, booting to run old programs and use either of the above OS’s for the new software. From all I read, I’m thinking to install Maverick rather than Yosemite avoiding all the new complications. I’m not that savvy, don’t have to have all the latest whistles and bells (obviously if I still have 10.6.8), preferring not to have to resort to all of these tricks. Advise please and I only need about 50 GB for the SSD; does Cindori have a good one?

    Thank you experts.

  58. Rob 2 years ago

    This enable/disable advice is all very well, but what do you do if you cannot boot up your Macbook Air (early 2011) in the first place?
    Someone please tell me how to reboot

    • KC2684 2 years ago

      Rob
      Perhaps you should tell us what in particular prevents you from booting your MBA.
      Do you get the Gey STOPand/or X?
      Oscar has provided some steps in this site to restart.
      I would also think that TRIM Enabler is not required since the MBA’s have SSD’s and that, unless you changed to a different supplier to perhaps get a larger drive, the Apple turns on TRIM for its SSD drives.
      Barry

  59. Cynthia (again from Dec. 16) 2 years ago

    Apologize for not reading earlier posts thoroughly. Found chris_974 (October 27, 2014) who replies: “that SSD Samsung 840 EVO 1To works wonderfully without using trim enabler 3.3. … that it uses by default the garbage collector ( it’s the same thing that TRIM). You can uninstall Trim Enabler …. So, my experience lets me to tell you, if you use a same SSD or equivalent, don’t use trim enabler immediately (?), make the update to yosemite, state that the new OS works normally and fast, wait for a new update of yosemite “10.10.01″ with trim activated by default for SSD’s third party.
    Nota Bene : If you are sceptical, search in google Samsung SSD 840 EVO and garbage collector and read comments’s xbitlabs.com”

    Read the above comments on 840 EVO and I’m sold; very grateful for this Chris_ 974. But I’m still confused. Are you deactivating/uninstalling Trim immediately and then use later? Why when you’re saying that it’s redundant to the inner garbage mechanism of Samsung 840? Clarification please.

    Thank you.

  60. chris_974 2 years ago

    At the beginning i used yosemite OS X 10.10 without TE activated, not installed.
    I take a lot of photos with my Canon 70D and work with Aperture. I noticed that Aperture took more time to open the library (8900 photos) over time.
    So i decided to use TE 3.3 and effectively Aperture works now really better. Aperture opens my library immediately, there is no latency.
    I recommend to use TE 3.3 with your EVO 840 EVO, Trim and GC are complementary.

    Kind regards.

  61. Moridin 2 years ago

    After installing the OS X 10.10.1 update, TRIM enabler stopped working. This is what happens when I try to turn it on:

    1. Run TE 3.3.
    2. Switch lever to ON.
    3. Mac restarts to turn OFF kext signing.
    4. Switch lever to ON again.
    5. Popup informs me that it needs to restart to turn OFF kext signing. Again.
    6. GOTO 1. Can’t seem to enable it.

    Shutting down the Mac during reboot doesn’t help either.

    Any ideas?

  62. Corey Nguyen 2 years ago

    I have a quick question. So my 15″ mbp mid 2012 has the yosemite 10.10.2 update and I have trim enabler, but it is not enabled. Do I just turn the switch on a reboot as normal or do I have to turn kext off, and if so how? I’m pretty new on this stuff, so sorry if this question was answered already.

    • Binh Quang 2 years ago

      Ok, I updated the OS X to 10.10.2 yesterday and it rebooted fine, so I was anable TRIM and restarted to take affect. It did not boot up. It just die at the white screen. Reset PRAM, did a recovery mode, verify HHD and repair HHD, did not work, reinstall OS X and it boot up again.

      JUST A WARNING FOR TRIM ANABLE

  63. Chumdoggin 2 years ago

    Hi Oskar,

    Not sure I used TE but was doing some message/cloud/wifi stuff booted in safe mode and got the blocked sign on boot. I went into another installation and removed those bt/network kexts then remembered I may have installed te. Your terminal commands for recovery boot fixed the problem wonderfully. Thank you.

    Im wondering if booting in safe mode effected the boot flags? I heard I think from you the pram reset did but nothing about booting in safe mode. Or did I miss that part?

  64. Taaniel 2 years ago

    Samsung 840 EVO & MBP mid 2012 user here.

    I’ve re-enabled TRIM multiple times, everything seems okay in the system report, but still ssd write speeds are max 20-70mb/s. I also went through the process with “fsck -fy” and still no signs of the speed I had before upgrading to Yosemite.
    Any help? All though system runs fine, and my MBP reboot time is 20 seconds, I still feel a slight performance change compared to the speed I had with Mavericks.

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