Was running monitor and found the following message:
5/13/14 11:03:20.000 AM kernel[0]: process vendettaclient[470] thread 80116 caught burning CPU!; EXC_RESOURCE supressed due to audio playback

On OSX 10.9.2, 3.5 GHz Intel Core i7.

Basically, the OS is just saying that the cpu is active and would drain your batter faster than normal.

You can enable a framerate limit in the Options->Graphics settings to lower CPU usage to try to remove this warning.