https://wccftech.com/apple-to-announce-move-from-intel-to-arm-chips-for-mac-at-wwdc-2020/

Apple will be announcing its plans to transition Macs from Intel to ARM chips during its Worldwide Developer Conference on June 22.

As reported by Bloomberg, Apple plans to introduce ARM-based Macs powered by its own custom 5nm A-series chips, by 2021. To ensure that developers have sufficient time to update their apps to work with the new architecture, Apple will be announcing its transition plan, and providing development tools so that developers can be prepared ahead of time. TSMC will be handling production for 5nm A-series chips for Macs.