1 2 Previous Next 21 Replies Latest reply: Sep 29, 2012 3:52 AM by xscottish
xscottish Level 1 Level 1 (0 points)

I have been working on this problem for several days.

When I allow my Imac to go to sleep it locks up when I try to boot up it won't.The only way I can get into it is to go into safe mode or go directly into disk utility by holding the control and r while starting.

I have done the following things

1: repaired the hard drive and verified the hard drive repaired the permissions and verified the permissions. each time I do this there are repairs needed. After the repairs I can start up and use the computer as if nothing is wrong, a couple of times I have stalled and the computer slows down with the rotating beach ball and I have to go back and do repairs again.

 

2: I have disconnected all of the peripherals except the keyboard and the wireless touch pad. Problem doesn't go away.

 

3:I have reinstalled mountain lion 3 times

 

4: I have replaced the time machine drive with a brand new drive

 

5: I have ran 'tune up my mac" after the last repair and it has just happened again.

 

When I do all of the repairs they are successfull and I can work with the computer for quite some time before having a lock up and it always occurs if let it go into sleep mode

I am considering virus protection but I dont want to waste any more money on a problem that may be a hardware problem.

 

Any help would be gratefully received.


imac, Mac OS X (10.5.2)
  • 1. Re: Imac locks up
    BDAqua Level 10 Level 10 (116,480 points)

    1: repaired the hard drive and verified the hard drive repaired the permissions and verified the permissions. each time I do this there are repairs needed.

    Is it Drive Repairs are needed each time, or just Permission Repairs... which can be ignored?

  • 2. Re: Imac locks up
    xscottish Level 1 Level 1 (0 points)

    Drive repairs and they are not the same one each time

  • 3. Re: Imac locks up
    BDAqua Level 10 Level 10 (116,480 points)

    See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...

     

    http://support.apple.com/kb/PH7029

     

    Boot off your *original* Install Disk while holding down the *d key*, (not c key), then run the extended Apple Hardware Test. Some disks require you to use the Option key at bootup to select AHT. Some Discs have it inexplicably on Disc #2. Some models have a separate AHT CD.

     

    The Memory test can really only be trusted if it finds a problem, not if it doesn't find a problem.

     

    Memtest OS X...

     

    http://www.memtestosx.org/joomla/index.php

     

    Rember is a freeware GUI for the memtest ...

     

    http://tech.kateva.org/2005/10/rember-freeware-memory-test-utility.html

  • 4. Re: Imac locks up
    xscottish Level 1 Level 1 (0 points)

    I just had another lock up and this time I had to go into safe mode but when I ran the disk utility and ran Repair disk and verify both came up with no errors. I came out of safe mode and it botted up normally. I am sending this message on it and all appears to be well.

  • 5. Re: Imac locks up
    sayelo Level 1 Level 1 (0 points)

    I would use an external utility to rebuild the directory; such as Disk Warrior. It helped me several times, when DiskUtil said the that the Drive appears to be Ok, or even when the Utility did not repair.

  • 6. Re: Imac locks up
    BDAqua Level 10 Level 10 (116,480 points)

    Agree with sayelo, DW is priceless.

     

    Do keep us posted please.

  • 7. Re: Imac locks up
    Linc Davis Level 10 Level 10 (118,305 points)

    Disk Warrior is an expensive and specialized application whose only use is to try to recover data from a damaged volume that Disk Utility can't repair, and for which there are no backups. It's not a maintenance tool; it's a recovery tool. If you have adequate backups — which means multiple backups — you’ll never need a recovery tool, and therefore Disk Warrior is useless to you. Don't waste money on it. Spend the money on backup drives instead.

  • 8. Re: Imac locks up
    xscottish Level 1 Level 1 (0 points)

    The problem continues, It appears to happen after the computer has gone into sleep mode. I have checked the hard drive each time and now there are no errors. I purchased "Rember" and had it check all of my memory with all tests for 30 cycles. everything seems to be ok.

    I am now testing to see if it is related to my email . I have closed email (which I usually leave on ) and I am letting it go into sleep mode. Next I will close Safari and let it go into sleep mode.

    The computer performs fine while I am using it

    I have not purchased Disk Warrior, since I have not had any disc errors since and my computer does not appear to hae lost any data.

    This is a mystery, I would take it to the apple store but I think that it is something I am missing

     

    I forgot to comment that the disc is not issuing any SMART errors

  • 9. Re: Imac locks up
    BDAqua Level 10 Level 10 (116,480 points)

    Open console in Applications>Utilities, check the system log for the date/time of the last problem  & the Startup right after that for clues.

  • 10. Re: Imac locks up
    Linc Davis Level 10 Level 10 (118,305 points)

    I have not purchased Disk Warrior...

     

    Good. Don't.

     

    You seem to be saying that you can sleep and wake normally in safe mode. Is that true?

  • 11. Re: Imac locks up
    xscottish Level 1 Level 1 (0 points)

    I have not stayed in safe mode for any length of time. Just to run disc utility which shows everything should be ok when I restart normally everything works ok. I have a copy of my system log which I can't interpret but it does show some error activity but I can't interpret. Can you help with this?

  • 12. Re: Imac locks up
    xscottish Level 1 Level 1 (0 points)

    One other piece of information . I disabled sleep mode for over 24 hours while running the memory test and it did not lock up

  • 13. Re: Imac locks up
    Linc Davis Level 10 Level 10 (118,305 points)

    Please test sleep/wake in safe mode and post your results.

  • 14. Re: Imac locks up
    xscottish Level 1 Level 1 (0 points)

    No problems in safe mode, Let it go to sleep mode several time during the last 18 hours

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