this is a fork of cody's gfxCardStatus, aiming to provide Power Source and Power Management related features, notably the ability to save separate settings for battery and ac power.

also may consider a more complex version of the app (probably a preference panel), to have features like presets for even different battery levels, and whitelist/blacklist, etc. (i.e. a complete dual GPU manager if Apple continue to screw things up like using nVIDIA for Tweetie, :( )

original README

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*  GFXCARDSTATUS by Cody Krieger  *
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gfxCardStatus is an open-source menu bar application for OS X that allows users of unibody MacBook Pros
with dual GPUs to monitor the status of, and switch between said GPUs. Supported MacBook Pros/graphics chipsets:

Late 2008-2009 MacBook Pros with NVIDIA GeForce 9400M integrated and 9600M GT discrete GPUs
2010 MacBook Pros with Intel HD integrated and NVIDIA GeForce 330M GT discrete GPUs

Features:
- allows locking the system on one GPU or the other, or allowing automatic switching
- does not require you to log out or restart to switch GPUs - it's all done on the fly!
- allows you to see which GPU is in use at a glance in the menu bar - "i" for integrated, "d" for discrete
- Growl support ensures that you know exactly when the GPU changes, provided you have Growl installed
- light, fast, and minimalist. doesn't get in your way, and uses little to no system resources

Feature requests/bug reports are always welcome by email: cody [at] codykrieger [dot] com