Mac developers are currently in the midst of a major hardware architecture transition. But for some app makers, this is the third time that they have done this. After years of rumors, Apple announced the transition to first-party Apple Silicon chips in 2020. Then the first Macs with a proprietary M1 processor launched in November — and apps started taking advantage of the new speed. Although the transition is expected to take two years in total, Apple offered a system and devices to make the process easier on both consumers and developers. Existing apps that work with macOS Big Sur can — at least in theory — simply run as normal on M1.