How to play audio in Safe Boot?
I have the exact same problem with my 15&quot; mid-2010 MacBook Pro.  It does not suddenly reboot when in Safe Boot-- only in the normal boot.  Apple is aware of this problem but will not assign even one engineer to look into this problem as I have been complaining to them for over 6 years about this.
I was told that possibly the battery needs to be changed-  but Apple stopped making batteries for this model years ago.
So, theonlygusti, if you change the battery and it works properly or not, please let me know. I'll be very appreciative.