This isn't the first time we're hearing this rumor, but Bloomberg (opens in new tab) reported today that Apple will be launching Macs with CPUs of its own design in 2021. The designs are said to be based on TSMC's 5nm process and feature up to 12 processing cores.
We've heard this rumor numerous times before, with the most recent time coming from from Apple analyst Ming-Chi Kuo.
According to Bloomberg's unnamed sources, Apple is working on three different chip designs, though details on the entire lineup are scarce. The top-of-the-line model is said to feature 12 cores, eight of which are high-performance cores, plus four energy-efficient ones. The former are codenamed Firestorm, and the latter, efficient cores are reportedly codenamed Icestorm and have an architecture similar to that of the A12X used in an earlier iPad Pro.
In January, there was also news that Apple had already reserved two-thirds of TSMC's upcoming 5nm capacity.
Apple transitioning to its own silicon designs in Macs and MacBooks would be a complicated process. Therefore, we'd expect the company to start off by introducing its chips into a few mainstream laptops, sticking with Intel for Macbook Pros.
Despite the cost and development nightmares that would be associated with such a transition, Bloomberg's report claimed Apple's move is aimed at gaining more control over how its devices perform as well as differentiation. It also pointed to Intel's slow release schedule.
It's no secret that Intel has been having trouble making advances with its silicon designs, nd is having an especially tough time moving to the 10nm process. Consequently, it isn't really surprising that Apple might have the urge to take matters into its own hands.