Apple Logo - White Screen
An update was applied and now the MacBook Pro has what appears to be the CPU fans running on high. The apple logo with the white screen comes up and the OS does not load.
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try this procedure.
restart the computer using Apple + S key
you will boot up in single user mode (black screen with white text)
once ready to type, type the following
/sbin/fsck -fy
this will run disk utility in single user mode. .let it complete which may take some time.
once this completes, type the following
/sbin/mount -uw /
once that completes type the following
rm -rf /libray/caches note the spaces in this command
once complete then type the following
reboot This will restart the computer
see if that helps.
restart the computer using Apple + S key
you will boot up in single user mode (black screen with white text)
once ready to type, type the following
/sbin/fsck -fy
this will run disk utility in single user mode. .let it complete which may take some time.
once this completes, type the following
/sbin/mount -uw /
once that completes type the following
rm -rf /libray/caches note the spaces in this command
once complete then type the following
reboot This will restart the computer
see if that helps.
Restart your Mac and hold down the Command key and the R key (Command-R). Keep holding these keys until the Apple icon appears. This indicates that your Mac is starting up from the recovery partition. After the Recovery System is finished starting up, you should see a desktop with an OS X menu bar and a "Mac OS X Utilities" window.
Select Disk Utility and run it.
On the next screen, select the hard drive in the left hand column, the First Aid tab on the top, and click on Repair Disk. (bottom left)
When that is done, click on Repair Permissions.
When that is done, quit Disk Utility and restart.