![]() Wait patiently - 15-20 minutes - until the Recovery main menu appears. Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. ![]() If your model can do Internet Recovery, then see:īe sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive. ![]() In order to do what you ask you must boot the computer from another disk such as the installer DVD that came with your computer or by using Internet Recovery: Computers that can be upgraded to use OS X Internet Recovery. ![]()
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