Just an FYI . . . Apple announced today a new version of GarageBand AND a new version of OSX (Mavericks.) The amazing thing is that both of these are absolutely FREE.
The only caveat is that GarageBand requires OSX Mavericks to run, and there are additional in-app purchases available within GarageBand. Other than that, GarageBand now is basically a light version of Logic Pro X. Both are available for download in the App Store.
Logic Pro X, OS X Mountain Lion (10.8.5)
