264 iPhone_iPad_Mac_apple

My MacBook will not boot. It goes about 1...

My MacBook Pro will not boot. It loads about 1/3 of the way on the line under the Apple logo the just shuts off and goes blank. What can I do?

Install El Capitan or Later from Scratch

If possible backup your files.

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 Install OS X and click on the Continue button.

This will install the version of OS X you had installed.

最后更新：2018-01-09 14:30:39