In some cases, your computer may not be able to update to the newest Apple OS, but you need to update to a newer OS in order to install a piece of software. For example, you might be trying to install Office 365 but you get a message that you need to update your OS first. Here are some links to newer operating systems:
Mojave 10.14: https://itunes.apple.com/us/app/macos-mojave/id1398502828?ls=1&mt=12
Cataline 10.15: https://itunes.apple.com/us/app/macos-catalina/id1466841314?ls=1&mt=12
If you have any questions, feel free to contact the Tech Desk at 570.577.7777 or techdesk@bucknell.edu.