To find updates for iMovie, GarageBand, Pages, Numbers, Keynote and other apps that were downloaded separately from the App Store, open the App Store on your Mac, then click the Updates tab. That includes Safari, iTunes, Books, Messages, Mail, Calendar, Photos and FaceTime. Or click “ More info” to see details about each update and select specific updates to install.
Choose System Preferences from the Apple menu , then click Software Update to check for updates.If you’ve upgraded to macOS Mojave or later, follow these steps to keep it up to date: