I'm curious about this too.
Minimum:
OS: Windows Vista SP2 or Windows 7 SP1
Processor: Intel Dual-Core 2.4 GHz or AMD Dual-Core Athlon 2.5 GHz
Memory: 2 GB RAM
Graphics: NVIDIA GeForce 8800GT or AMD Radeon HD 3830 or Intel HD Graphics 4000 with 512 MB VRAM
DirectX: Version 9.0c
Hard Drive: 10 GB available space
Sound Card: DirectX®-compatible
Recommended:
OS: Windows 7 SP1
Processor: Intel Core i5-2300 or AMD Phenom II X4 940 or better
Memory: 4 GB RAM
Graphics: NVIDIA GeForce GTX 560 or AMD Radeon HD 7750 with 1 GB VRAM or better
DirectX: Version 9.0c
Hard Drive: 14 GB available space
Sound Card: DirectX®-compatible
This is from the STEAM website and offcourse for windows machines, but maybe you can see something from it.
As I see it, you can play it on low settings, but not for sure.
When I fill in the specs of the Macbook Air i7/8gb on game-debate, the figure says that the processor and ram is enough, but the GPU doesn't reach the minimum specs. (but its on 1280x1024)
But as Dayz says the minimum spec is a Intel hd 4000, you should can play it, but dont ask me anything about FPS.
You can see it for €24!