I just got it back with a new hard drive and it was working fine for 3 days, then I applied the latest Mac OS update. The update caused a restart and ...

If your Intel-based Mac computer displays a blank or blue startup screen, or a question mark at startup, ... Check your login items to see if any of them are incompatible. ... If your Mac starts up after a brief delay, try reselecting your startup disk.

It's time to check if your hard drive has got any problems. You have to run Disk Utility to confirm the same to fix your Mac grey screen. You can get Disk Utility running by booting into OS X Recovery Mode. ... Choose your Mac's built-in hard drive in the left column of Disk Utility.

When your Mac stalls on a plain gray screen, it is never good news. ... If you encounter the gray screen after restarting with a peripheral, you have located the ...

Safe mode (hold down Shift from startup sound through to login or desktop)—same thing, stuck on grey screen ...

There are a few things that happen when you start your computer. One of the first you will notice will be the startup chime. This happens after a self-test of the ...

If it freezes immediately after you log in, you may not be able to use it at all. Before you worry about losing ... Release the key after you see the grey Apple logo. You will see "Safe Boot" on the login screen if it worked. Continue to use your laptop ... This type of problem can be repaired using Mac's Disk Utility. Insert your OS X ...

Macbook Pro Yosemite 10.10.2 fails to boot, hangs at grey screen. ... and was met with the Apple logo and the software update loading bar, then after a few minutes a grey screen. ... I install XQuartz and am able to login and launch apps.