First of all, my specs are:
2.8GHz Intel Core i5
Graphics ATI Radeon HD 5750 1024 MB
OS X Lion
As you can see, they are below average, so it's definitely not my computer but rather your port.
•The first minutes of the game are painful and until I press my abilities and/or move around for a bit, there are incredibly bad lag spikes affecting my performance.
•Barbarian's Leap ability comes to mind. It always triggers fine but lag spikes mid-air, giving me a very hard time feeling like farming is continuous because my game just stops for half a second.
•It would be nice if Mac users had the same launcher as Windows users, considering how we have no Options, Info or Help buttons, and no direct way to access the PTR / download the PTR.
•Screen alerts also result in lag spikes. After a big kill streak, the screen freezes for even a second and then continues on like nothing happened, showing me the number of mobs killed.
These are just four that come to mind at this moment.
My point is that, in the past years, the Mac community has started to grow and grow in the gaming industry and it would be nice of Blizzard to start taking our platform's problems seriously, else I will find myself required to bootcamp my way out and play on Windows like the others, thing which I don't find that hard, but I hope that one day my performance on OS X will be on par with everyone else.