Previous 1 2 Next 15 Replies Latest reply: May 7, 2013 11:53 PM by Brandon
Brandon Level 1 (0 points)

I need help I just installed 16 gigs of RAM and my mid 2010 iMac. It passes the post test but stays on the gray Apple logo screen.

 

RAM description:

2x8gb= total 16gbs

PC3- 10600

DDR3- 1333

204-pin

 

I have no idea why it's working please help.


iMac (21.5-inch Mid 2010), Mac OS X (10.7.5)
  • Paul_31 Level 6 (13,655 points)

    Try pulling the RAM and reseating it. Where did you buy the RAM from and what make is it?

  • Brandon Level 1 (0 points)

    Micro Center...

    Make: crucial

  • Brandon Level 1 (0 points)

    I resealed the RAM three times already. I put the original RAM back in and everything works fine.

  • Kappy Level 10 (266,046 points)

    Boot from your Snow Leopard DVD and see if it starts up OK. If it does, then you need to reinstall OS X.

     

    Reinstalling Lion/Mountain Lion Without Erasing the Drive

     

    Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.

     

    Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.

     

    When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.

     

    Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.

     

    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

  • Brandon Level 1 (0 points)

    Do I have to do all that in that order?

  • Paul_31 Level 6 (13,655 points)

    From many threads I've seen on here, it seems can be very picky about the RAM chips that are installed. If you've tried re-seating it and still have the problem but the original chips work I'd suggest returning them for a refund and start again perhaps buying directly from Crucial or Macsales:

    http://eshop.macsales.com/shop/apple/memory/iMac

    http://www.crucial.com/

  • Brandon Level 1 (0 points)

    So my RAM chips are no good?

  • Kappy Level 10 (266,046 points)

    No, but it won't be very helpful unless you do.

  • Kappy Level 10 (266,046 points)

    It is reasonable to assume that if it passes POST, then the RAM is OK.

  • Brandon Level 1 (0 points)

    Okay thanks.

  • Paul_31 Level 6 (13,655 points)

    So my RAM chips are no good?

    Possibly, if the Mac works with the orginals but not with the new chips I'd be looking at exchanging the modules.

  • Brandon Level 1 (0 points)

    It won't even let me get past the gray Apple logo screen to get to the disk utility.

  • Kappy Level 10 (266,046 points)

    Are you booting from your Snow Leopard DVD or are you booting from the Recovery HD?

  • Brandon Level 1 (0 points)

    I'm in the disk utility now booted from Snow Leopard DVD. The only thing I wasn't able to boot the OS from the Snow Leopard DVD.

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