When playing around with ps we found that if you add System.RunWhenNotFocused = true
to your psclient.cfg file when you run mac you will not get that paused when you tab out of game and lose focus on the game. You can thanks Trymm for testing this on his intel mac to verify that it works. [no i did not find this but i am posting it so you can all benefit from it]
Caarrie
[edit the file with a text editor and add the line to the plugins section then save]