I have the latest 11inch MacBook Air, top spec processor with 8gb ram. It runs the game comfortably, even 3D match engine on one of the higher graphics settings, not the top one though. The fans can kick in during a match but nothing too loud and my current game is only running the full English leagues but that was by choice rather than limitation.
Just edited to say it will run the 3D engine on the high setting but it gets much hotter and noisier, there is a noticeable jump between that setting and the medium in terms of heat and noise.
The game runs and looks great on medium settings so have no worries about that.