Which Versions Of macOS Are Compatible With Your Mac?
If you are using an older version of macOS and are ready to update to a newer version, the first step is figuring out which versions of macOS your Mac can use. Apple provides compatibility information for each version, and you can find them all at https://macmost.com/j-system as well. If you are looking to downgrade or to upgrade to a version not supported by your Mac, I have some general advice.