The name 'Rosetta' is a reference to the Rosetta Stone, the artifact which enabled translation of Egyptian hieroglyphs. It gives developers and consumers a transition period in which to update their application software to run on newer hardware, by 'translating' it to run on the different architecture.
for macOS, an application compatibility layer between different instruction set architectures. Rosetta is a dynamic binary translator developed by Apple Inc. PowerPCbinary translation (original version) PowerPC application (Microsoft Word for Mac 2004) running on OS X for Intel in Rosetta
