Apple's upcoming M2 chips are expected to arrive in lower-end Macs in 2022, followed by the more powerful M2 Pro and M2 Max versions in higher-end systems in 2023. The third-generation M3 chips are expected to arrive 18 months after the M2. 

According to Taiwan's Commercial Times, Apple Mac chips are on an 18-month development cycle, with the second-generation Apple silicon expected to launch in 2022 and 2023. New Mac computers powered by Apple's upcoming M2 chips will be available in the second half of 2022, according to the report. More powerful Mac systems based on Apple's M2 Pro and M2 Max chips are expected in the first half of 2023. 

The new chips are expected to be manufactured using TSMC's new four-nanometer process technology. TSMC's five-nanometer process is used to manufacture the current first-generation Apple M1, M1 Pro, and M1 Max chips. According to the report, the same technology will be used in the production of the Apple A16 chip for the iPhone 14 family in 2022. 

Take note of the supposed 18-month refresh cycle for Mac chips versus the iPhone and iPad chips, which have been on an annual development cycle since the beginning. 

Apple's transition to its own silicon for Macs will take two years and will culminate in the introduction of an Apple Silicon edition of the Mac Pro workstation in 2022.