i have an old mac( Late 2013 imac) need to upgrade --how can I do this ? i have osx10.9.5
how do i upgrade this old computer --late 2013 imac -- osx 10.9.5
iMac, OS X 10.11
The latest system that that model can run is macOS 10.15.7 (19H15), Catalina. You can download the installer from here: macOS Catalina 10.15
