Reset NVRAM/PRAM. http://support.apple.com/kb/PH18761
If this doesn’t help, please contact Apple.
Click “Contact Support” at the top right corner of this page.
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When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
Reset NVRAM/PRAM. http://support.apple.com/kb/PH18761
If this doesn’t help, please contact Apple.
Click “Contact Support” at the top right corner of this page.
Reset NVRAM/PRAM. http://support.apple.com/kb/PH18761
If this doesn’t help, please contact Apple.
Click “Contact Support” at the top right corner of this page.
White dots on mac book screen