Your Mac just about makes it for macOS Catalina. This is great - it’s the strongest security system for macOS you can get yet. Bear in mind though, Catalina only supports 64-bit apps, so if you know you’re going to use some 32-bit programs consider installing Mojave instead, it’s still a very good version.
- Make sure your Mac is backed up and you have reliable internet connection for the installation;
- Since you’re using such an old version of OS X, first you need to upgrade to El Capitan. Get the installer here;
- Find the installer in your Applications folder and follow the on-screen instructions. It will take a while;
- Now that you have a newer OS you can proceed to upgrading to Catalina. Download the installer here;
- It should open automatically. Follow the on-screen instructions.
- Again, the process may take some time.
One of my favourite features of Catalina is that you can use an iPad as a second screen. You’ll also find that in this version there will be no iTunes. Instead, Apple replaced it with several new applications for music, videos and podcasts. Is that a good or a bad thing? Up to you, but I personally liked it more when I could keep all my media in the same place.