Manually switch to Integrated Only or Discrete Only mode to force one GPU on or the other. The Dependencies list: open the gfxCardStatus menu when your discrete GPU is active to see what is turning it on. Growl or Notification Center notifications when the GPU changes. It also is a menubar app for OS X helping MacBook Pro users to see which apps are impacting their battery life by using the more power-hungry graphics. GfxCardStatus, a tool initially designed to display which graphics subsystem is active in MacBook Pro (Mid-2010) models via ”i” and “n” icons that signify Intel HD Graphics, and NVIDIA GeForce GT 330M graphics, respectively, has now been updated to allow on-the-fly switching between the cards.