Analyst Ming-Chi Kuo said “Apple plans to launch several Mac notebooks and desktop computers with its own custom-designed Arm-based processors in 2021.
Arm-based processors will significantly enhance the competitive advantage of the Mac lineup, allow Apple to refresh its Mac models without relying on Intel's processor roadmap, reduce processor costs by at least 40 to 60 percent, and provide Macs with more hardware differentiation from Windows PCs.
Jean-Louis Gassée said “Ampere top of the line chips consumes less power, about 210 watts, than a competing Xeon CPU needing as much as 400 wats, for about the same amount of computing power — hence investors' interest in a device that could progressively supplant Intel products in tens of millions of servers around the world. Ampere shows us that the ARM architecture can yield the class of chips a Mac Pro would need. And, as it happens, the chips are manufactured by TSMC, the same company that makes Apple’s Axx processors.”
So again, in Theory, an ARM-ed Mac Pro is technically possible.
Earlier this month, Kuo said ” Apple's first Mac notebooks with Arm-based processors will launch in the fourth quarter of 2020 or the first quarter of 2021 (most likely 12inch MacBook ).
Apple will introduce MacBook models with an all-new design in the second or third quarter of 2021, but again, he did not indicate whether these will be Pro or Air models. The last significant redesign of the MacBook Pro occurred in October 2016, while the MacBook Air received a major redesign in October 2018.”