do you have a newer iMac? I would assume they rate the same within a few hundred points of a PC running similar hardware... I thought bootcamp and such were pretty efficient these day?
FFXI:Sylph - Perrin 75 Hume THF; Retired (At least from my use any way)
EVE Online:ScraperX; Retired
WAR:IronClaw- Peryn SW;SkullThrone- Grymloc BO; Retired