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macbook pro 2012 boot up prob with 10.11 for mac

I have a question I have ssd that work fine in mac 10.10.5 and 10.9.5 but after i install 10.11 after i shut it down it will not boot up take a few more sec and it does?Could it be the new sad drive i put in my laptop i still think something to do with mac 10.11?

MacBook Pro (13-inch Mid 2012), OS X Mavericks (10.9.5)

Posted on Oct 8, 2015 1:23 PM

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Posted on Oct 8, 2015 1:36 PM

Select Macintosh HD as the Startup Disk.

“Set the default startup disk” http://support.apple.com/kb/HT1310


Reset PRAM. http://support.apple.com/kb/PH18761

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macbook pro 2012 boot up prob with 10.11 for mac

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