No matter what source game I use, the same thing happens. 1. The game launches correctly, the Valve copyright screen plays correctly. 2. The game crashes with a hl2.exe "Engine error: Platform error: module failed to initialize." 3. An error pops up saying "The instruction at '0x10423e2c' referenced memory at '0x0e42a1a0'. The memory could not be read." I've got a MacBook Pro 17" with an ATI graphics card
