How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask CompExpert Your Own Question

CompExpert, Mac Specialist
Category: Mac
Satisfied Customers: 1103
Experience:  Apple Desktop/Laptops with 8 years exp. Apple Certified
Type Your Mac Question Here...
CompExpert is online now
A new question is answered every 9 seconds

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: 4 years ago.
Category: Mac
Expert:  CompExpert replied 4 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