Mac users with gaming roots are no doubt eager to load Steam for Mac when it hopefully goes public on May 12th. It will mark the first time that many of the best games in recent years will be available for the Mac and could catch the platform up to Windows in grand fashion. MacNN and Electronista have had the opportunity to participate in the beta and can give a clue as to whether or not it will be worth the wait -- as well as a test to see if it's worth abandoning that Boot Camp partition.