Open Finder and select File and Get Info.Connect your external drive and format as macOS Extended (Journaled) if necessary.That way you can do what you like with the app without impacting your Mac storage.
If you’re still struggling to find disk space, you may like to move the iMovie library onto an external drive. Move the iMovie library to an external drive If you’re still using up too much disk space, it’s time to think about buying a larger disk or using an external drive. It should be more than enough to use iMovie and anything else you need.
#HOW TO FIND HOW MUCH SPACE ON MAC TV#
Optimize Storage is useful if you watch a lot of TV or movies using iTunes. When you select Manage, you have some options. Presumably, if you’re seeing low disk space messages, you won’t have much available space. You should see a graphical representation of your disk usage where you can see how much storage you have used and how much you have free.
Open the Apple menu and select About This Mac.