There are lots of reasons why you might find that your MacBook won’t turn on, or your Mac won’t start up, but you probably just want to get it working again. We’ll run through the various checks and changes to make to get your MacBook Air or MacBook Pro, iMac, Mac mini, or other Mac to turn on so you can start using it again.
Read on for some simple tips that should get your Mac working, from the obvious stuff like checking the power connection, to performing a power cycle, starting in Recovery mode, and checking the file system. And if your Mac really is dead, we’ll also tell you where to turn next.
Read more at Macworld.com