Yesterday's update 0.2.10 is now available for Mac and Linux. Apologies for the delay. There is also a minor fix for the slowdown upon entering the civilian area in the tutorial. Additionally, this should alleviate some of the slowdown when loading a save. Windows users have also received this fix.
Check the changelist here:
http://steamcommunity.com/gid/103582791436785824/announcements/detail/177098774633807571
-Mitch.