OK, my speculation: OS X depots being changed now should probably mean finishing touches, as generally the pattern (as per history
https://steamdb.info/app/1086940/history/ ) so far has been lots of updates to Windows depots with OS X depots coming very close before release (of either a patch or a hotfix).
That being said, I really should find something more useful to procrastinate on...
![smile smile](/images/graemlins/default_dark/smile.gif)