I initially planned to purchase Black Ops for Mac from the Mac App Store for my late 2009 iMac. I was thinking I'd then buy GameCompanion and connect an Xbox 360 controller to my computer, effectively making it an Xbox. Unfortunately, I just checked the machine's specs, only to find that I have 256 MB of video RAM instead of the recommended 512 MB. The exact card is the ATI Radeon HD 4670 256 MB. If I did purchase the game, would I notice a severe amount of dropped frames, making gameplay really frustrating? If so, are there quality settings in the game I could turn down? Also, could the use of a wireless controller create additional lag? Any advice appreciated.