In concert with its release of Logic Pro 9.1, Apple has released Main Stage 2.1, updating the live performance program that's part of Logic Studio with a long list of improvements. The main changes include added support for 64-bit mode, added compatibility with 64-bit Audio Unit plug-ins, reliable syncing for Multiple Playback plug-ins that are grouped together, increased compatibility with documents created in Main Stage 1.x, and improved recording with the Loopback plug-in. Also, two crashing bugs have been fixed, including one that was triggered by using Command-N to create a new concert when a Save dialog for a previous concert was still open, and another that occurred occasionally when closing or quitting the program. A full list of mostly minor changes is available on Apple's Web Site. Running the program in 32-bit mode requires Mac OS X 10.5.7 or later; 64-bit mode requires Mac OS X 10.6.2 or later. The update is available via Software Update or the Apple Support Downloads page. ($499 new, free update, 210.91 MB)
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