Apple's regular chip supplier TSMC has a party planned this week. It has nothing to do with New Year's Eve, but with the start of mass production of 3nm chips. And that's good news for Apple users, too. 
Gonny van der Zwaag | iCulture.nl – 26 December 2022, 10:59 whatsappfacebooktwittertelegramlinkedinmailprint
The 3nm chips will largely go to Apple and will probably be used for the first time in the upcoming M2 Pro chips that you will find in the MacBook Pro 2023. They would also be intended for a new high-end Mac mini, equipped with M2 Pro. According to DigiTimes, mass production will begin this week on Thursday, December 29. This is in line with previous predictions that production would start as late as 2022 – even if it is in the nick of time.
A ceremony is scheduled for December 29 at the factory at the Southern Taiwan Science Park (STSP) to celebrate the start of mass production. Plans will also be announced that day to further expand 3nm chip production, sources at semiconductor equipment manufacturers report.
Apple currently uses a 4nm chip for the A16 Bionic chip in the iPhone 14 Pro models, but may make the switch to 3nm early next year. This means better performance and less power consumption for the Macs that have these chips built in. Possible candidates are the 14-inch and 16-inch MacBook Pro, the Mac mini, but also an updated Mac Studio. Later that year we can expect the M3 chip, which will also be based on the 3nm process. This also applies to the A17 Bionic chip in the iPhone 15 Pro. But before that, it's already September.
Previous rumors that the 3nm chips would already be in the iPhones from 2022, have not come to fruition.
See also 
“TSMC will begin next year with production of 3nm chips, release in 2023'
iPhones and Macs will probably be equipped with 3 nanometer chips in 2023, instead of the current 5 nanometer chips. Reports on the production chain point to this.