In short, it’s an emulator that will give developers a bit of breathing room as Apple transitions architectures.
This process runs primarily on the back end and is invisible to the user, though they might notice a bit of performance slowdown as it does its translational work. It is not a substitute for creating a native version of your app.” “Rosetta is meant to ease the transition to Apple silicon, giving you time to create a universal binary for your app. “Rosetta is a translation process that allows users to run apps that contain x86-64 instructions on Apple silicon,” its developer page reads. So that’s why the company has released Rosetta 2. While this change will enable Macs to run iOS and iPadOS apps in addition to MacOS ones, it does prevent the new devices from running apps designed for the old Intel chips. These will utilize an ARM64 architecture - a departure from the x86–64 architecture found on the Intel chips Apple used previously. The new M1 silicon chip that Apple unveiled at its One More Thing event on Tuesday is the first of company’s new line of custom Arm-based silicon processors.
