TRIM SSD Support Enabled in Mac OS X 10.6.8 Update

Jun 27, 2011 - 37 Comments

Mac OS X 10.6.8 TRIM Support

The recently released Mac OS X 10.6.8 Software Update has quietly added native TRIM support to Macs equipped with SSD drives. TRIM insures that your SSD drive will be functioning at optimal speed and extends the life of the solid state disk, making this a must-have update for any Mac user using solid state storage.

Enabling native TRIM support on your Mac’s SSD drive is just a matter of installing the Mac OS X 10.6.8 software update and then rebooting your machine. Installing the OS X 10.6.8 update eliminates the need for the assorted third party hacks that surfaced to hack TRIM to work, so it may be a wise idea to disable those tools before installing the official update.

Mac OS X 10.7 Lion also includes TRIM support natively, and is due for a public release sometime this July.

Update: We can confirm that TRIM is enabled on Apple provided SSD’s with 10.6.8 installed, but some third party SSD’s continue to not support TRIM despite the update. Lion may address this, or you can continue to use the third party TRIM Enabler tool.


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Posted by: AJ in Mac OS, News


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  1. Peter Binderberg says:

    There is the Angelbird SSD with native mac TRIM support.
    No hacking needed. Works out of the box!

  2. Zachary says:

    This worked with mac mini mid 2011 with Plextor 128M2P and OCZ vertex 2

  3. choopeee says:


    I have an iMac (27″ 3,4 Core i7 1TB…) and i put an SSD into it(Kingston SSDNOW V100). I have lion on this, but the TRIM is not working and the machine crash always after one week…
    I tried to fix with these apps, but these are not working.

    Please HELP!


  4. reynog says:

    MBP 5,3 with Apple TS256A, TRIM support still says “NO” after 10.6.8 update. Any ideas?

    • Danielle says:

      I have the same drive (APPLE SSD TS256A) and even upgraded to Lion and the Trim support still says “NO”.

      I’m not sure why this drive seems to be the only one with this issue. Every post I read pertaining to this drive and Trim Support is having the same issue.

      Hopefully someone could shed some light on the problems soon.


  5. […] einige einschlägige Mac-Blogs (hier und hier) berichten, hat Apple im letztem Update für einige SSDs von Drittherstellern still und […]

  6. […] einige einschlägige Mac-Blogs (klick, klick) berichten, hat Apple im letztem Update für einige SSDs von Drittherstellern still und […]

  7. Chris says:

    Still on 10.6.7 here. 2011 MBP:

    Capacity: 251 GB (251,000,193,024 bytes)
    Model: APPLE SSD TS256C
    Revision: CJAA0201
    Serial Number: 31IS10WLTLNZ
    Native Command Queuing: No
    Removable Media: No
    Detachable Drive: No
    BSD Name: disk0
    Medium Type: Solid State
    TRIM Support: Yes
    Partition Map Type: GPT (GUID Partition Table)
    S.M.A.R.T. status: Verified
    Capacity: 209.7 MB (209,715,200 bytes)
    Writable: Yes
    BSD Name: disk0s1
    Macintosh HD:
    Capacity: 250.66 GB (250,656,219,136 bytes)
    Available: 87.83 GB (87,828,344,832 bytes)
    Writable: Yes
    File System: Journaled HFS+
    BSD Name: disk0s2
    Mount Point: /

  8. malveaux says:

    Apple TSA128 = yes

  9. Ethan says:

    Trim support has been around since 10.6. OSX daily even covered it. why is this news?

  10. hill says:

    same model, apple TS128A, trim=no

  11. JHB says:

    Trim is still not enabled on my late 2008 aluminum macbook with an Apple SM128 128GB SSD on 10.6.8.

  12. EldRick says:

    Important to note that in order for the TRIM support to actually DO anything on a drive that has been in use, you MUST perform the procedure listed above, in order to re-write the files that were previously written without the TRIM support.

  13. zanzibar says:

    I got my OCZ working with Trim Enabler 2


    here’s directions from MR forums:


    To TRIM your disk after enabling TRIM:
    1. Open Disk Utility
    2. Select your SSD from the right-hand-side bar
    3. Click “Erase” tab
    4. Select “Erase Free Space…”
    5. Select the fastest method (no need to add extra write cycles by doing it multiple times) and click “Erase Free Space”

    If you run Erase Free Space, you should run these commands in the terminal afterwards:

    sudo chown root:admin /

    sudo kextcache -system-prelinked-kernel

    sudo kextcache -system-caches

  14. Andrzej says:

    The same in Intel G2 80GB SSD (no TRIM)

  15. palmin says:

    TRIM is also no for second generation Intel X25-M.

  16. Greg says:

    No TRIM for a 120GB Intel X25M neither.

  17. ElCubano says:

    Well that answers that! I would agree that Apple has good reason to enable trim on their branded drives.

    OWC Merc SSD’s are quite the performers, unfortunately the cost of SDD’s can’t be justified as I am running the Seagate XT Hybrid… performs awesome. Also my newborn does need diapers. ;) Maybe by the time she doesn’t need diapers, SSD’s will be CHEAP!

  18. Tim says:

    Many new SSD’s have advanced garbage collection methods and don’t actually need TRIM at all. Be cautious with that aftermarket TRIM Enabler app with new SSD drives, it can actually slow them down. I would say use TRIM when Apple supports it only, there is good reason they are not enabling in all drives by default until OS X 10.7.

    Read the comments on to see some firsthand reports.

  19. Patrick says:

    I have a really old OCZ that I paid a small fortune for and it’s still not working. Too old of firmware maybe? Bah, wait for Lion and cross our fingers I guess.

  20. Leon Birdi says:

    Trim=No on my OCZ Vertex 2 240 GB – any suggestions?

  21. end3rs says:

    Works for me, Apple branded Samsung

  22. Rognvald says:

    My 250 Gb Apple SSD is fine and now Trim enabled but I have a 48 Gb Express Card SSD in my 2010 Macbook Pro. System profiler reports Trim Support on this as No.

    Is there any way to enable trim on this please?

  23. Rich says:

    Doesn’t work with my OCZ Vertex2 SSD.

  24. Leho Kraav says:

    I’m running C300-CTFDDAC064MAG. 10.6.8 says TRIM = no to me.

  25. ElCubano says:

    Is the native trim only for Apple SSD’s, or will third party SSD’s be supported?

    I have a feeling it’s only for Apple SSD’s

    • AJ says:

      Good question, I can confirm only for a MacBook Air with Apple supplied SSD but I have heard it extends to some others. I’ll update when I hear more.

    • Rune Evert says:

      I think you are not right, because I have a MBP 2009 issue
      with Apple installed 128 GB SSD by Samsung, and SL 6.8.6 s/w. My current System Profile says No to Trim Support. How can I get Trim active for my 128 GB ssd? Will Lion do it?

  26. John says:


  27. […] Native TRIM SSD support is also included in 10.6.8 update, making this an essential update for all Mac users using solid state storage. […]

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