https://techcrunch.com/2020/06/22/apple-will-let-you-emulate-old-apps-and-run-ios-apps-on-arm-macs/

Apple has announced a major shift for the Mac. In the future, the company is going to switch from Intel CPU to Apple’s own silicon, based on ARM architecture. If you are a developer or if you run obscure enterprise apps, you may have a lot of questions about how it’s going to work.

First, you’ll be able to compile your app to run both on Intel-based Macs and ARM-based Macs. You can ship those apps with both executables using a new format called Universal 2. If you’ve been using a Mac for a while, you know that Apple used the same process when it switched from PowerPC CPUs to Intel CPUs — one app, two executables.