Clean Yosemite Install On 3rd Party SSD

Discussion in 'OS X Yosemite (10.10)' started by Oliver G, Mar 14, 2015.

  1. Oliver G macrumors regular

    Joined:
    Sep 24, 2007
    Location:
    Melbourne, Australia
    #1
    My brother has given me his 2010 MacBook Pro with a 256GB SSD running 10.9 and I want to do a clean install of OS X 10.10 Yosemite.

    It is an aftermarket SSD (256GB OCZ Agility 3 SSD Drive) can I do a clean install straight away or do I need to do something else?

    I will only be using it for documents and web browsing.

    I have read a few things about this called Trim and I was wondering what it is and if this SSD will work with Yosemite, Do I need to do anything else before performing a clean install?

    Sorry for the newbie question.
     
  2. satinsilverem2 macrumors 6502

    satinsilverem2

    Joined:
    Nov 12, 2013
    Location:
    Richmond, VA
    #2

    All you need to do is a clean install is a USB drive with the Yosemite installer on it. You can read on how to do this on a bunch of websites. As for Trim, its a command that the OS sends to the drive to do garbage collection basically and keeps the drive running at its fullest potential. Only Apple SSD's are officially supported by OS X but you can still use Trim by installing a small utility called Trim Enabler. The only thing you have to remember to do is disable it whenever you install updates to prevent a black screen boot loop. Other than that you can be happy with Yosemite and a 3rd party SSD.
     
  3. luftx macrumors member

    luftx

    Joined:
    Jun 2, 2008
    #3
    Honestly, do you need the TRIM app? I've read so much (and confused myself) that I don't know what to do. I've enabled TRIM, but do I really need it?
     
  4. Taz Mangus macrumors 68040

    Taz Mangus

    Joined:
    Mar 10, 2011
    #4
    I have been wondering that as well.
     
  5. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #5
    You don't need it for the SSD to function properly. However, you may experience performance degradation after a long period of time (probably several months to years) if you use your SSD extensively. This performance degradation is probably only noticeable in benchmarks, and you may not notice it in day-to-day usage. I would just use it to keep your SSD healthy.
     
  6. luftx macrumors member

    luftx

    Joined:
    Jun 2, 2008
    #6
    Can you just enable it occasionally to let it clean the drive up?
     
  7. RichardC300 macrumors 65816

    RichardC300

    Joined:
    Sep 27, 2012
    Location:
    Chapel Hill, NC
    #7
    That I'm not sure. I was never able to find an answer. But it looks like Cindori (the creator of TRIM enabler) has something in the works that may do something along those lines.
     
  8. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #9
    Yes. You can enable TRIM then command-s boot to single user mode and run the command "fsck -fy" (without the quotes) and that will TRIM all free space on the drive. Then reboot and turn off TRIM. That should get your write speeds back to good as new.
     

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