I slapped this in my new 2012 Mac Mini (the max it can take) and it works great(16gb total). There isn't a whole lot more to say. At least those thinking of using this in a Mac will know it is compatible.
UPDATE 5/20/2014 Reduced rating down to 1 star. Since I ordered the ram, I have had to replace it twice. Two failures is two too many. Will never buy Corsair again.