In `/var/log`:
-rw-r----- 1 root admin 2K Jan 21 19:01 windowserver.log -rw-r----- 1 root admin 5G Jan 21 18:45 windowserver_last.log
Wow!! 5G of log files??
Most of it looked like this:
Jan 21 18:45:48 [727] (ipc/rcv) invalid name: CGXRunOneServerPass: mach_msg (gServiceSet) failed (last RPC: LaunchAppRequestWithAuditInfo) Jan 21 18:45:48 [727] (ipc/rcv) invalid name: CGXRunOneServerPass: mach_msg (gServiceSet) failed (last RPC: LaunchAppRequestWithAuditInfo) Jan 21 18:45:48 [727] (ipc/rcv) invalid name: CGXRunOneServerPass: mach_msg (gServiceSet) failed (last RPC: LaunchAppRequestWithAuditInfo)
Whatever that means... I had to use **sudo rm _var_log/windowserver*.log** in order to free some space on my drive...
#Mac