How to download your iTunes library: Use iTunes Match with your iPhone or iPad How to move your iTunes library to a new Mac or external drive tutorial. While you can use iTunes Match to share your music with different Macs, if you wanted to actually move your iTunes library to external storage or another machine then you can follow our How to download your iTunes library: Move your library to another Mac If your collection is vast then it might be best to start this process just before you go to bed, then hopefully you’ll awake to a locally stored library. Depending on the size of your library this could either take a few minutes or many hours.
Going forward you can launch iTunes from your Applications folder the same way you used to.Now iTunes will start downloading all of your tracks.Ta-da! Now you have iTunes up and running on your Mac again :).Finally! Click the Launch iTunes button.Before the installation can finish you’ll need to authenticate yet again.Now you may want to go grab yourself a cup of tea or coffee – this is probably going to take a while.Enter the same username and password you use to sign into your Mac and click OK.Before the installation can start you’ll need to authenticate, so click the Authenticate button.Choose the version of iTunes you’d like to install and then click Continue.Select iTunes – you can re-run the app and install Aperture or iPhoto later if you’d like.This time the error message should include an Open button – click it.Right-click the app again and select Open.In all likelihood, an error message will appear.zip file, instead of double-clicking the app to run it, right-click (or ctrl + click) it.