troubleshooting
My Mac Pro turns on, trys to boot up and then nothing appears on the monitor. NOTHING at all...just blue screen...not the desktop. Help
Mac Pro (Mid 2010)
Please read this whole message before doing anything.
This procedure is a diagnostic
test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether your problem is caused by third-party system modifications that load automatically at startup or login.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
- Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
- When you see the gray Apple logo, release the shift key.
- If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.
*Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.