It is possible to run Mac OS and Mac OS X applications in a limited fashion on hardware that is not Macintosh-compatible. To do this, the following products are available:

Mac on Linux (MOL): Mac on Linux is an open source project that allows Mac OS and Mac OS X to run on Linux for the PowerPC processor. It supports most applications that run in the versions of Mac OS and Mac OS X supported by MOL. However, it will not run in Linux for other processors (e.g., x86, m68k), and it isn't compatible with MkLinux. For more information, see: http://www.maconlinux.org/
PearPC: PearPC is an architecture-independent PowerPC platform emulator capable of running most PowerPC operating systems, including Darwin and Mac OS X. For more information and to download this open-source software, visit: http://pearpc.sourceforge.net/
Executor: Produced by ARDI, Executor is a Mac OS emulator for Windows, OS/2, Linux, and OPENSTEP. It is based on Mac OS 6.0.7, but offers some Mac OS 7 compatibility. Though the number of applications it will run is somewhat limited, it does have the ability to read and write high density formatted Mac OS disks. To discuss Executor, visit its newsgroup, comp.emulators.mac.executor.

vMac: Rather than emulating Mac OS, vMac functions as a virtual Macintosh Plus. It will run most programs that a real Macintosh Plus will, including Mac OS 7.5.5. There are versions of vMac for Windows, OS/2, OpenStep, Unix, and even Mac OS. vMac itself is freeware. Unfortunately, to use it, you have to have a copy of the ROM from a Macintosh Plus, something that is of marginal legality in many cases. For more information, visit the vMac Project web page at: http://www.bannister.org/
Macintosh Application Environment: The Macintosh Application Environment (MAE) is a Mac OS emulator for HP-UX and Solaris. Additionally, it is possible to run MAE remotely from any workstation with an X Window System server. The final version runs Mac OS 7.5.3 and supports most 68k and FAT applications, but is not compatible with PowerPC-only applications. MAE has been discontinued, so obtaining a copy may be difficult.

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