I have a 27" 2011 BTO iMac with 16GB of RAM and I am running OS X Lion 10.7.4. I normally do not need to reboot unless I'm installing updates. Now since installing Photoshop and Bridge CS6, my iMac is paging out and not freeing up memory when Bridge or Photoshop isn't using it. Someone correct me but isn't 10.7.4 and CS6 designed to better manage memory? And if that's the case, why isn't this memory released back to the system?