macOS Monterey will no longer support older MacBook Pro and Air models
After the WWDC 2021 keynote speech, Apple released preview pages of macOS Monterey and iOS 15. These include Apple’s release to the public later this year of a list of all devices that these two operating systems will support. When it comes to the latest version of it desktop software, the company plans to give up support for many older computers.
To install macOS Monterey on your computer, you'll need a late 2015 or later iMac, a 2017 or later iMac Pro, an early 2015 or later MacBook Air, an early 2015 or later MacBook Pro, a 2013 or later Mac Pro, a late 2014 or later Mac mini or an early 2016 or later MacBook.
By contrast, you can install macOS Big Sur on a 2014 or later iMac, a 2017 or later iMac Pro, a 2013 or later MacBook Air, a late 2013 or later MacBook Pro, a 2013 or later Mac Pro, a 2014 or later Mac mini or a 2015 or later MacBook.
In short, with the exception of iMac Pro, most of Apple's product lines have lost some form of support. This is the most intense when it comes to Apple's more consumer-oriented product line. As you can see from the list, the MacBook Air and MacBook Pro series include models that were not available in Monterey a few years ago, although many of these computers may contain the same or more powerful hardware as the late 2014 Mac mini.