HT201702: Intel-based Mac Power On Self Test RAM error codes
Learn about Intel-based Mac Power On Self Test RAM error codes
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Helpful answers
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Aug 21, 2016 9:29 PM in response to jayfromkapoleiby Kappy,No, it isn't a virus. Mac OS X- Gray screen appears during startup. You may need to erase the drive and reinstall OS X from scratch.
Install Yosemite or El Capitan from Scratch
Backup if possible before continuing.
- Restart the computer. Immediately after the chime hold down the Command and R keys until the Apple logo appears. When the Utility Menu appears:
- Select Disk Utility from the Utility Menu and click on Continue button.
- When Disk Utility loads select the volume (indented entry, usually Macintosh HD) from the Device list.
- Click on the Erase icon in Disk Utility's main window. A panel will drop down.
- Set the Format type to Mac OS Extended (Journaled.)
- Click on the Apply button, then wait for the Done button to activate and click on it.
- Quit Disk Utility and return to the Utility Menu.
- Select Reinstall OS X and click on the Continue button.
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Aug 22, 2016 12:47 AM in response to jayfromkapoleiby lllaass,What do you mean by "runs in a high optempo"?