HT204267: If your Mac won't turn on
Learn about If your Mac won't turn on
-
All replies
-
Helpful answers
-
Jul 8, 2015 1:22 AM in response to EveNatby thunderzzz,Try these steps:
Restart your Mac with the Shift button pressed.
- Shut down your Mac
- Wait until your computer turns off and after that press the Power button
- Right after you hear the startup tone, press and hold the Shift key
- Release the Shift key when you see a grey Apple sign and the progress bar below this sign
- Once you see Desktop, start a Disk Utility scan to detect and repair file system errors (don't forget to choose your main hard drive)
- Click on Verify Disc and then, if asked to fix problems, on Repair Disk
- After this, click on Verify Disk Permissions and then on Repair Disk Permissions
- After the process is finished, shut down your Mac and turn it back on after about 30 seconds
Apart from that, take a look at this Apple article and follow the instructions on Resetting NVRAM shown there: How to Reset NVRAM on your Mac - Apple Support
Take a look at the steps suggested by Apple in this article:
https://support.apple.com/en-us/HT204267
Hope this helps!
-
Jul 8, 2015 1:46 AM in response to thunderzzzby EveNat,Sorry that didn't work. When resetting the NVRAM do you risk loosing stuff on the Mac such as Photos and Videos?
-
Jul 8, 2015 2:57 AM in response to EveNatby GhonaZ,No you won't lose that data.
NVRAM controls things like speaker volume, screen resolution, boot order and kernel panic information (if available). Stuff that is stored on the harddrive remains untouched.
-
Jul 8, 2015 3:08 AM in response to EveNatby OGELTHORPE,What is the EXACT model/year of your MBP and the current OSX?
Ciao.