When Apple released the first Macs with the M1 processor (the first generation of Apple silicon), it also introduced a whole new architecture to run apps on the Mac. So to take full advantage of the new chip's speeds, Intel software needs to be re-written specifically for the M1 processor. Developers need time to write apps with that “native” code, however, so Apple created a translation tool called Rosetta 2 that allows for existing Intel-based software made for Intel Macs to run on Apple silicon.
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