Do I need to enable TRIM with El Capitan

Discussion in 'OS X El Capitan (10.11)' started by mac98aop, Oct 14, 2015.

  1. mac98aop macrumors newbie

    Dec 21, 2010
    Hey folks

    Just updated from Mavericks, and have a Crucial SSD - previously with Trim Enabler installed.

    Now I see that that App has been benched as 'incompatible' and wonder I should now do.

    I've heard all sorts of reports of 'don't bother, you don't need TRIM' to 'type this in Terminal'.

    What does one do please?!?!


  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    There are some here who seem to enjoy semantic arguments about if one "needs" TRIM, and hence the debate you mentioned. I'll just avoid the "need" debate and say IMO TRM is beneficial with an SSD in that it maintains write speeds. Now that is is officially built in and can be enabled without any sort of hack, I see no reason not to run it.

    Just run the command below in Terminal and it will enable TRIM.

    sudo trimforce enable
  3. jkeekij macrumors regular

    Oct 17, 2011
    Is this not automatic? I installed an SSD in my new mac mini and never ran a command, and I am showing TRIM is active.
  4. KALLT macrumors 601

    Sep 23, 2008
    Only Apple SSDs are enabled by default.
  5. jkeekij macrumors regular

    Oct 17, 2011
    That is odd, I installed a Samsung SSD and never ran a command and I show enabled. Just wasn’t sure how this was supposed to work.
  6. KALLT macrumors 601

    Sep 23, 2008
    Well it’s not automatic to my knowledge and given that Apple expressly warns you before you can enable it, I doubt that they would turn it on by default, unless the drive you installed is one Apple uses itself.
  7. Ebenezum macrumors 6502a

    Mar 31, 2015
    First make sure you have backup of your files!

    Then check Crucial site for current firmware for your SSD, if its newer than what your SSD has currently its a good idea to update it, instructions for Macs can be found Crucial forum. This is because older firmware might have bugs which affect TRIM.

    Afterwards you can enable TRIM with Weaselboys instructions.

Share This Page

6 October 14, 2015