Precompiled versions of the emulator, including the ROM image and operating system software, that runs on Windows, are available.
The program is released as source code, so you will actually compile it into binary ie, executable form before you can run it. Supported hosts include Windows and Linux and possibly other Unix-type systems. It works by dynamically recompiling Mac programs including Mac OS X into x86 binary code that runs on your PC, and adding a layer that translates things like endianness. If you prefer the features, speed and completeness of support of a commercial software, try looking at Parallels Desktop for Mac and VMWare Fusion. Note: if you are looking for an emulator or virtual machine that runs on a Mac and allows you to emulate a PC, running operating systems like Windows, you should try the Free x86 PC Emulators and Virtual Machines page instead. Listed on this page are Macintosh emulators: some of them emulate a 68k Macintosh such as what you get in the Macintosh Quadra, Performa, Classic, etcothers emulate a PowerPC Macintosh.