RealPC was compatible with PowerPC Macs running system software 7.1.2 through 9.2.
RealPC emulated a Pentium-based PC with MMX technology, supported Sound Blaster and MMX, and allowed you to use a Macintosh joystick, allowing you to run PC programs, including MS-DOS, and Windows, games and applications, alongside your existing Macintosh applications.
Linux was not supported and due to shared RAM between Mac OS and RealPC Windows 98 was the reasonable limit.
RealPC was able to convert Virtual-PC hard disk files to use and run the installed OS.
[1][2][3] Its box and CD featured the image of silent film star Harold Lloyd.