Currently Being ModeratedApr 20, 2013 1:21 PM (in response to budda_42)
Problems on the hard drive would be my guess. Here's the less invasive solution:
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.
This will install 10.8.3 so no update will be required afterwards.
Currently Being ModeratedApr 25, 2013 10:13 AM (in response to Kappy)
Thank you for the suggestions. After reading your post I checked for disk errors and file permission errors and found none. The SMART status is verified. I also checked SMART status using disk warrior and did a surface scan that found no errors. Next, I erased the partition and had the erase write zeroes as it erased. Then I did a clean install and had exactly the same problem.
Any other suggestions would be appreciated.
Currently Being ModeratedApr 25, 2013 10:17 AM (in response to budda_42)
And, you checked the version that was installed and it's still 10.8.2? Apple no longer distributes that version, so you should have had 10.8.3 installed via the Internet Recovery. But it not then download and install OS X Mountain Lion Update v10.8.3 (Combo).
Currently Being ModeratedMay 7, 2013 1:22 AM (in response to budda_42)
I did a clean install of 10.8.3 on a new hard drive and it still will not boot past the grey screen.
10.8.1 runs fine.
Apple hardware test finds no problems. Memory and hard drives test without errors.
Does anyone have a possible explanation for why 10.8.3 cannot boot?