How to keep older systems secure with a newer OS
From a security standpoint having the latest macOS on your system is always preferred. However there is hardware that was simply cut off by Apple and is unable to install the latest macOS and there are those that choose to stick with an older version of OS X because they don’t like the newer versions.
If you want to upgrade to a newer macOS you can of course buy a new Mac but doing this every time Apple decides your hardware is not worthy of the latest OS, can get pretty expensive. What if I tell you there are ways to keep your older Mac but still be secure?