Every year, when Apple releases its latest version of macOS, there’s a good chance that another generation of Macs won’t be compatible with the new operating system.
While this is not necessarily a problem — if your Mac was working well last year, there’s no reason why you can’t continue to use it this year — it can be potentially dangerous from a security perspective. Apple generally provides security updates for the current and two previous macOS versions. However, you may not be aware that Apple often doesn’t patch some vulnerabilities in the two previous Mac operating systems.
So, if you have an old Mac that’s no longer supported by the current version of macOS, what should you do with it? Here are several ideas.
Read the rest of the article on The Mac Security Blog.