We’ll try to stick to firmware and software features without diving too deep into the actual hardware architecture differences these things are not Big Sur features as such, but since Big Sur will be the first macOS version to run on Apple Silicon Macs, a Big Sur review seems like the best place to document them.
The goal, once an Intel Mac and an Apple Silicon Mac are booted up next to each other, is to make them look the same way and do most of the same things despite the radically different underlying hardware. Apple is modernizing the macOS bootloader and using translation software to allow current x86-64 Mac apps to continue to run while developers develop ARM versions of their apps (or, more likely for a few years, Universal apps that will run on either architecture).
Further Reading First ARM-based Mac laptops: MacBook Air and 13-inch MacBook ProĪpple’s strategy for ensuring software continuity and a smooth transition relies on essentially the same methods that made the PowerPC-to-Intel transition possible.
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