On Osx, drivers and any updates are all installed using Software update. This is found by clicking the apple symbol on the top left of your screen then choosing Software updates.
If you open up the console while AM is running you might get a clue as to what may be causing the crashes from there. (Open up the spotlight search (top right of your screen has a magnifying glass) and type in console. Choose it from the list then work away with AM.) If it crashes or glitches then hopefully something in the console will give a clue as to the problem.
Cheers
Mike