I’ve just put the finishing touches on the first public release of GPUInfoMenu, a menu applet that shows exactly which GPU is running on the latest GPU-switching MacBook Pros. You can download it here: GPUInfoMenu

Features:

• Monitors the system for GPU changes, immediately updating the icon when graphics switching takes place
• Listens for CGDisplayRegisterReconfiguration so that does not need to poll for changes - updates only when needed
• Handles registering/unregistering startup behavior
• Auto updates with Sparkle