![]() #Sheepshaver cannot open rom file for mac os It is stable and sufficiently fast on both PowerPC and x86 computers. Mac OS 7.5.2 to 8.6 are considered stable, but Mac OS 9.0.4 is also experimentally supported. The newer Mac OS operating systems Mac OS 9.1 to 9.2.2 cannot run because they require an MMU that is not provided by the PowerPC emulation. In order to run Mac OS, SheepShaver needs an image of a Mac OS ROM, whereby the ROM used determines the compatibility with a certain Mac OS version. In older Macintosh computers (later referred to as "Old World" ), the ROM was still housed in its entirety in a ROM chip on the motherboard of the computer. This can be read out on the original hardware and saved in a file that ShapeShifter, Basilisk II and SheepShaver can use as a ROM file. In newer Macs (called “New World” by Apple ) a separation between Boot-ROM ( “Low-Level” ROM) and “Mac OS ROM” (“ Higher Level ROM”) has been introduced. These ROM files are required by SheepShaver in order to be able to start a Mac OS supported by them. The Mac OS ROM (“ Higher Level ROM”) is already part of the operating system from Mac OS 8.5 for “New World” Macs. The boot ROM (“ Low-Level ROM”) that is still required could be read from an existing Power Mac, but Apple also offers official ROM updates from which the respective ROM can also be taken as an image. ![]() SheepShaver thus offers the following functions: SheepShaver emulates generic PowerPC hardware the original Macintosh ROMs are required to be compatible with Mac OS. Compatible with guest systems Mac OS 7.5.2 to 9.0.4 (depending on the Mac OS ROM used).PowerPC-G4 emulation, with JIT translation on IA-32 (i386, x86), AMD64 (x86-64) and MIPS.native execution on PowerPC-G4 hardware ( virtual machine ).Copy and paste between guest and host systems. ![]()
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