It's done this twice now and it's getting frustrating.
Processor 2.2 GHz Intel Core i7
Memory 4 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6750M 1024 MB
OS X 10.8.2
MacBook Pro from around 2010 but has run Starcraft 2 and all other Blizzard games on ultra graphics just fine.