![]() Rosetta is a user-level program and can only intercept and emulate user-level code.īy contrast, the 68k emulator accesses the very lowest levels of the OS by being at the same level as, and tightly connected to, the Mac OS nanokernel on PPC Macs, which means that the nanokernel is able to intercept PowerPC interrupts, translate them to 68k interrupts (then doing a mixed mode switch, if necessary), and then execute 68k code to handle the interrupts. Rosetta is neither included nor supported in Mac OS X v10.7 Lion or later, which therefore cannot run PowerPC applications.Īlthough most commercial software for PowerPC-based Macs were compatible with these requirements, any applications that relied on G5-specific instruction sets had to be modified by their developers to work on Rosetta-supported Intel-based Macs.Īpple advised that applications with heavy user interaction but low computational needs (such as word processors ) would be best suited to Rosetta, while applications with high computational needs (such as AutoCAD, games, or Adobe Photoshop ) would not. Rosetta is not installed by default in Mac OS X v10.6 Snow Leopard, but can be retained as an option via the installer or Apple Software Update. Rosetta is based on QuickTransit technology. ![]() It was initially included with Mac OS X v10.4.4 Tiger, the version that was released with the first Intel -based Macs, and allows many PowerPC applications to run on certain Intel-based Mac computers without modification. ![]() Cheetah Emulator Mac OS X Cheetah Emulator Mac OS X 10 ![]()
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