The Linux version should follow shortly after the Mac version, since most of the work will be done already.
First of all, we’ll continue to bugfix and update Early Access alongside finalizing the full release. Furthermore, you can expect a Mac version on Steam Early Access and a version of the game for Linux some time after its full release on PC/Mac.
Eargasm.
Didn't think I could possibly look forward to Original Sin any more, but that track definitely bumped the anticipation up a notch.