No entry sign stops boot after updating Yosemite - help please?

Discussion in 'OS X Yosemite (10.10)' started by whitedragon101, Feb 11, 2015.

  1. whitedragon101 macrumors 6502a

    Joined:
    Sep 11, 2008
    #1
    I have just updated yosemite and I get a no entry sign on boot and thats it, it won't start up. I do have a third party hard drive and trim enabled so I tried this.

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

    But it still won't boot.

    (When i performed the last command
    kextcache -u "/Volumes/Your Disk name"
    it went to the next line immediately, no delay, not sure if it ran properly)

    If anyone has any ideas that would be great.


    ps

    If I just do a reinstall OS X from the CMD+R recovery will it keep all my installed apps from OSX and leave my windows bootcamp alone?
     
  2. KALLT macrumors 601

    Joined:
    Sep 23, 2008
    #2
    Have you tried again? Did the previous steps not work?
    Perhaps you could contact the developer if nothing else works: http://forums.macrumors.com/member.php?u=153120

    It should. Do you have a (Time Machine) backup ready, just in case?
     
  3. whitedragon101 thread starter macrumors 6502a

    Joined:
    Sep 11, 2008
    #3
    No errors occur when typing in the commands. The only thing thats a little suspicious is there is no 5-10 min wait after the last command. But no error either.

    I do have a time machine backup.
     
  4. KALLT macrumors 601

    Joined:
    Sep 23, 2008
    #4
    I’m not sure whether a reinstall will fix the issue, so I can’t give any advice. Normally a reinstall should leave the personal files untouched and only reinstall/repair the system files. I suspect that the kext files (system files) will be restored as well. It’s up to you whether you want to give it a try or not, if the solution on that website doesn’t work.
     
  5. whitedragon101 thread starter macrumors 6502a

    Joined:
    Sep 11, 2008
    #5
    I restored from a time machine backup and things seem to be working although quite a few apps are missing. But only some apps.
     

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