In the weeks prior to Apple’s announcement of the first Apple silicon Macs in June 2020, there was intense speculation over how they would run existing macOS software. While most correctly recognised that this would be implemented using translation of x86 code as had been performed by Rosetta during the transition from PowerPC to Intel in 2006, some also saw a role for virtualisation. At the time I wrote that “Apple could provide a complete virtualisation layer which let users run most Intel Mac...