I started using SteerMouse to get rid of the acceleration, which helped that part of the problem, but I didn't have an explanation of why playing Starcraft 2 on OS X feels less accurate than when I play on my home computer except that it didn't 'feel' right. I don't notice it when I'm just working or browsing the internet, but when I'm trying to accurately control mouse movement to specific spots repeatedly in a game, it's a glaring flaw. Kudos to the author for figuring out the root cause of the issue. Hopefully now someone will be kind enough to offer a fix.

I can't understand why this issue would persist in a major operating system.