SheepShaver: macOS run-time environment for BeOS and Linux

SheepShaver is a MacOS run-time environment for BeOS and Linux that allows you to run classic MacOS applications inside the BeOS/Linux multitasking environment. SheepShaver is distributed under the terms of the GNU General Public License. You still need a copy of MacOS and a PowerMac ROM image to use SheepShaver. If you're planning to run SheepShaver on a PowerMac, you probably already have these two items. Yes, SheepShaver originally appeared for BeOS in 1998 as a commercial application. No. Firstly, SheepShaver doesn't run under Windows. Secondly, MacOS X doesn't run under SheepShaver.