Change your GPU (didn't agreed wiht my 4890, but for your 2600XT, i'm 100% ok with that).(now i have one, i know it doesn't helps FPS, but everything else. had 8-16 FPS low/med settings with my MP. (i would say, if so, that also means the code is bad ) but ED stills hide behind their 'Extreme Simulation' joker word. Not seeing a 100% core load on an application doesn't mean your CPU is overperforming.MacPro 1,1 - 2,1 - 3,1 are Top Of The Line Core2 architecture - They (DCS members) don't like Core2.:cry:.I'll try to sum up what guys told me here : (Me : Hello EtheralN :D, doing fine? ) But i didn't succeeded, and bought a PC :devil_2: It's been quite some time i tried/asked everything possible to run BS2 smoothly with my MP. Lucky for you, i'm still around (even if i don't play often nowadays (still waiting for bugfixes in BS2!!!!)) If i don't get wrong, you're the second MacPro user on DCS forum (after me :cheer3nc: )