On Tuesday, 5 June 2012, Apple released MainStage 2.2.2, an update to the company’s software for bringing virtual instruments and effects to live performances.
According to the full release notes, the update addresses 14 different issues. Apple highlighted the following:
The MainStage 2.2.2 update addresses overall stability and performance issues including:??
*Addresses a stability issue that could cause MainStage to quit unexpectedly on OS X 10.7.4?
*Fixes an issue that prevented the I/O plug-in from outputting audio?
*Resolves an issue related to the download and installation of basic and additional content
MainStage is a 302 MB download from the Mac App Store. Its price is $29.99, although the 2.2.2 update is of course free for current MainStage 2.2 users. Formerly a component of the Logic Studio suite, Apple moved MainStage (and Logic Pro) to the Mac App Store last December.
Source: Mac Rumors