Non-latest macOS versions still receive security updates. Safari 15 is available for Big Sur and Catalina. It's not like one has to always upgrade to the last m

Non-latest macOS versions still receive security updates. Safari 15 is available for Big Sur and Catalina. It's not like one has to always upgrade to the last major version. When they go out of security support these machines work quite well under Linux (as I could test myself, I recycled a bunch already).