Apple has updated MainStage to version 2.2.1.

Installation:

• Resolves several issues related to the download and installation of basic and additional content.

Performance:

• Addresses an issue in MainStage 2.2 that could decreased performance of the Playback plug-in on computers with one or two cores.
• Resolves an issue in MainStage 2.2 that could decreased performance when using the 8-channel mixer & backing track template.
• Resolves an issue that could increased latency when playing software instruments with MainStage 2.2.
• Improves performance when running multiple instances of EXS24 in 32-bit mode on computers with multiple cores.
• Addresses an issue in MainStage 2.2 where performance decreased compared to MainStage 2.1.3 on non-hyper-threaded 2-core computers.

Audio:

• Fixes an issue in MainStage 2.2 where only the left side of the stereo signal was sent to an Aux if the channel strip had any mono to stereo conversion.
• Panning now works correctly on outputs other than output 1-2.
• Sends set to Post Pan now pan properly on mono channel strips.
• Fixes an issue that blocked sidechain input for plug-ins.
• Resolves an issue in MainStage 2.2 where the left side of external stereo audio signals was duplicated and processed by both sides of a stereo channel strip.

Plugins and Patches:

• Fixes an issue with using keyboard arrow keys to scroll through the Patch Browser.
• The Hide Ruler option for the Waveform object again works as expected.
• The slide direction of drawbars in EVB3 is no longer affected by the Scroll direction setting in Mac OS X 10.7 Lion.
• Resolves an issue where the bottom of some plug-in screens were not accessible on 11" MacBook Air when the plug-in was opened in Controls View.

General:

• Corrects various problems in MainStage 2.2 with non-English localizations.