As always when there is a new version of Logic Pro X, it’s a good time to back up your current version of the application, so you can revert back to an older version in cases of accessibility show stopper bugs or old projects not working right. You can follow this apple support article, or give this walk through of the process a listen. This method should also work for backing up the GarageBand app as well.
How To Back UP The Logic Pro Application
Posted in GarageBand, Logic, and Resources