Stupidly enabled TRIM on Yosemite without realising. Help.

Discussion in 'OS X Yosemite (10.10)' started by Spudhead, Feb 20, 2015.

  1. Spudhead macrumors member

    Joined:
    Jul 23, 2013
    #1
    Hey guys, turned on TRIM in Yosemite without knowing there was an issue with this. So comes to turning on my late 2011 MacBook with Intel 520 SSD and Im greeted with the stop sign on screen and cant load into OSX.

    I've tried a couple of old youtube videos with no success, about entering stuff into terminal in recovery mode. Only thing Im bothered about is some pictures on my MacBook that haven't been backed up yet. They're of my late dog that sadly passed recently and its the only things I have left of her.

    Just want to somehow get those pictures back and I'll be happy. Are there any known fixes for this thing? Seems like a crappy move on Apples part to do this.

    Help please :(
     
  2. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #2
    Why run to Youtube? There is perfectly good advice on avoidance AND recovery on the software-vendors website:

    http://www.cindori.org/trim-enabler-and-yosemite/

    BTW I haven't run TRIM since Yosemite came out, no measurable impact or downside so far...
     
  3. Spudhead thread starter macrumors member

    Joined:
    Jul 23, 2013
    #3
    thanks, ill try that link now. fingers crossed it works
     
  4. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #4
    I have done this several times, because I was doing some testing that required booting while trim was enabled. If you simply do a PRAM reset, you disable the boot. The terminal commands worked about half the time for me, with no real way to predict failure - except that the "prohibited" sign would seemingly laugh at my feeble attempts to try a work around.
    If the terminal commands don't seem to work, then you can just restart to your recovery partition, and reinstall OS X. Do that by restarting while holding Command-R, then choose Reinstall OS X from the menu that appears.
    That always gets the system working again, and you won't lose YOUR files and pictures.
     
  5. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #5
    I've seen others say that you just disable TRIM Enabler and restore original kext signing before updates that require booting, but your post makes it seem that ANY rebooting will require disabling TE and restoring original kext. Are others just assuming that people never restart or shut down their Macs except for updates?
     
  6. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #6
    It was not my intent to make my post appear to say that ANY reboot while TRIM is enabled would cause a problem. That is certainly not the case.
    Just to make this clear - system updates that require a reboot of your Mac (not all require a reboot) - or resetting the PRAM during a restart - will probably not boot again without running the terminal commands, or even a reinstall of Yosemite. So - you have the recommendation that you should disable TRIM BEFORE you install any system update.

    And - yes, I would be one of those who almost never shuts down, restarts fairly often, but never with a PRAM reset (not without thinking first :D ) Last time that I remember shutting down and leaving it off, is probably mid-October 2013, when I upgraded RAM and SSD.
     
  7. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #7
    Thanks. All this kext signing stuff with Yosemite is really confusing (especially the OS X update procedure ... disable TE > reboot > install OS X update > reboot > enable TE > reboot?) and has me hesitant about getting an SSD for my early-2011 MBP. Cindori has been saying there's something in the works for TRIM and Yosemite, so I'm anxious to see what that is.
     
  8. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #8
    For you info, that's just a precaution, not a requirement.

    I always update OSX (Yosemite) without disable TRIM, never run into any issue. TRIM will be disabled automatically after the update anyway.

    you can upgrade the OS without think twice and without any problem. However, you have to re-enable TRIM manually by yourself after the update is true.
     
  9. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #9
    Interesting. This goes against a lot of what I've been reading. If you successfully update OS X without disabling TRIM (and without reverting back to original kext signing), then what exactly is causing people to get those gray stop screens?
     
  10. steve23094 macrumors 68000

    steve23094

    Joined:
    Apr 23, 2013
    #10
    Same here. I forgot to disable it last OS update and it didn't screw anything up. If I remember correctly it automatically disabled itself and then told me to re-enable on next boot.
     
  11. jbarley macrumors 68030

    jbarley

    Joined:
    Jul 1, 2006
    Location:
    Vancouver Island
    #11
    My case exactly, computer booted no problem I just had to manually re-enable Trim after the update was finished.
     
  12. iArch macrumors regular

    iArch

    Joined:
    Oct 18, 2008
    Location:
    All Over
    #12
    That's how it's been for me through a number of updates, too. In fact I'd never even given it any thought. Then the most recent update came along and borked my MBP upon reboot. It was a complete PITA.
     
  13. KALLT macrumors 601

    Joined:
    Sep 23, 2008
    #13
    Technically it would be: disable TR > reboot > update OS X > reboot > disable kext signing > reboot > enable TR > reboot. :p
     

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