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CompExpert, Mac Specialist
Category: Mac
Satisfied Customers: 1103
Experience:  Apple Desktop/Laptops with 8 years exp. Apple Certified
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my macbook pro 2011 with lion will not restart - I have to

Customer Question

my macbook pro 2011 with lion will not restart - I have to manually shut it down. Often it does not go on sleep mode when the lid is closed, but does when it is opened again.

Also it often stops responding in the middle of something and I have to wait 10-20 seconds to continue work.

Have run Cocktail several times, but didn't help.

Would be grateful for help on this
Submitted: 5 years ago.
Category: Mac
Expert:  CompExpert replied 5 years ago.

CompExpert :

try to reinstall osx operaiting system. reinstall osx will not erase your data so give it a try.

1.if you have osx Lion 10.7, you dont need osx installation disc

2.just power on right away hold down command and R key

3.keep holding it until you see mac osx utilities screen

4.then select reinstall osx and follow the direction on the screen

CompExpert :

after reinstalled osx, your system should be back in working order again.

let me know if it workout for you. thanks