MAC 10.8.4 iMac end 2009 freezed CPU 200% at start game

Hi alfa testers my info is:

CPU 3,06 GHz Intel Core 2 Duo
Memory 10 GB 1067 MHz DDR3
Graphics ATI Radeon HD 4850 512 MB
Software OS X 10.8.4 (12E55)
iMac end of 2009 27 inch screen

i installed a build ALFA v.49900

i logged in and started a new game under UBERNET GAMES, joined an army and clicked ready so i could start with AI players... next thing it displays "starting game" but in this moment it froze and my imac also froze with the processor usage to +100 percent and graphics processing to +100%

So please check out these issues so i can alpha test in mac xD LOL

?? i pay 90$ to alfa test... and play is impossible in Mac OS

HELP :roll: :roll: :roll:

Not a Mac user myself (and never will be ) so I have no idea. You may want to look in the Mac/Linux alpha forum and ask there. General discussion is really the wrong place.