[icecreammatt]

Valve has indicated that support for it is coming soon. Their recent developer conference they demoed it running on Linux. I'm not sure how well it's going to work on Mac with the lack of decent graphics cards unless maybe using a Hackintosh.

[geocar]

Then I'll consider it "soon".

[lwhalen]

Eeeexcellent. It'll be a cold day in hell before a Microsoft operating system darkens my network, especially the likes of Windows 10.