GarageBand: About the GarageBand for Mac (v10.0) update
Learn about updating to GarageBand for Mac (v10.0).
To update to GarageBand for Mac (v10.0), install it from the Mac App Store. It is a new application and will not be in the Updates tab.
Existing sounds and loops will not be overwritten. Previous versions of GarageBand are placed in a sub-folder (named with the app version) in the Applications folder. For example, GarageBand 6.0.5 would placed in a folder of the same name. Both GarageBand for Mac (v10.0) and GarageBand 6.0.5 will be available under the Purchases tab in the Mac App Store if you want to reinstall.