Start of the progress bar freezes.

What are the boot options for the Macbook?

Suggests to start in safe mode

<http://support.apple.com/kb/ht1564>

If the gel is caused by a 3rd party addition, safe mode won't try to load them.  If it's a kernel cache, safe mode first erases caches.  If it's related to some specific OS X provided driver, safe mode, in some cases using a more conservative driver (graphical driver being conservative is one of them).

If it does not start in safe mode, then try to start it on the recovery Partition

<On recovery - Support Apple macOS>

You should be able to run disk utility and if there are problems with system files, repair, maybe (maybe).

If none of this works, then consider making a Genius Bar, go to your local Apple store and have your rated system (this part is free; but suggested repairs cost).

I hope that you have backups, because backups are always good, and they can be comforting when something happens like that.

Tags: Mac OS & System Software

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