Currently Being ModeratedMay 9, 2013 12:01 PM (in response to Charles08)
You must do this:
Repair the Hard Drive and Permissions - Lion/Mountain Lion
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.
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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu. Select Restart from the Apple menu.
Currently Being ModeratedMay 9, 2013 12:31 PM (in response to Kappy)
No luck with either method (each tried twice). Install screen still appears after the apple and chime. When I try to use DU, instead of running the installer, the Repair Disk is still greyed out.
Currently Being ModeratedMay 9, 2013 12:36 PM (in response to Charles08)
There is only one method described. What do you mean by "either method?" Are you saying you cannot boot to a Recovery HD? If so, then you have a major problem.