Applications that require a G4 or G5 processor.Code that inserts preferences in the System Preferences pane.Run on a PowerPC with a G3 processor and that are built for Mac OS X. Rosetta is designed to translate currently shipping applications that I haven’t seen this reported elsewhere, and there hasn’t been any official announcement from Apple, but page 67 of Apple’s Universal Binary Programming Guidelines PDF explicitly states that Classic apps are not supported in the Rosetta emulator that runs PowerPC apps on Intel-powered Macs (emphasis mine): Classic Not Supported on Intel-Based Macs Monday, 6 June 2005
