Even if you’re not into iOS apps or games, it’s probably best to install it ASAP
macOS is Apple's operating system for the Mac. It has been around quite a long time, but in its current form, it really started in 2001 with Mac OS X 10.1. It's built on top of a UNIX core, which makes it very stable, versatile, and great for developers. It's popular with creators too, as a good platform for video editing and photography. More recently, Apple has begun working to bring iOS apps to the Mac, which could change how MacBooks, iMacs, Mac Pros, and Mac Minis work for everybody.
Shown off in a proof-of-concept video
It also adds support for the latest Xbox and PlayStation controllers
Version 3.0.12 has Apple Silicon support
A new half-sized Mac Pro is planned for launch by 2022