gfxCardStatus is an unobtrusive menu bar app for OS X that allows MacBook Pro users to see which apps are affecting their battery life by using the more power-hungry graphics.

gfxCardStatus is free and open-source.

Download gfxCardStatus v2.3

release notes, source code

gfxCardStatus is localized in 20+ languages:

  • English
  • Danish
  • French
  • German
  • Italian
  • Spanish
  • Swedish
  • Czech
  • Greek
  • Finnish
  • Latvian
  • Dutch
  • Polish
  • Portuguese
  • Brazilian Portuguese
  • Russian
  • Slovak
  • Turkish
  • Ukranian
  • Simplified Chinese
  • Traditional Chinese
  • Korean

requirements:

what the menu bar icons mean:

i — you're using the integrated GPU.
d — you're using the higher-powered discrete GPU.

features: