HT202731: Using Apple Diagnostics
Learn about Using Apple Diagnostics
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All replies
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Helpful answers
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Nov 7, 2015 10:54 AM in response to abasisby lllaass,This is what Option + D
Option-D Start up to either Apple Hardware Test or Apple Diagnostics over the Internet.
Command + R is Recovery
OS X: About OS X Recovery - Apple Support
Command+Option+R sometimes works for Internet Recovery is there is a Recovery partition
BTW, this is the Mac Pro desktop forum