AMG Advanced Media Group Powerpack For GarageBand (Mac): * PowerPack for GarageBand not only gives you more than 700 brand new professional Apple Loops but also 55 brand new instruments crammed with 784 sonic "widgets" ideal for remixing or adding to your own productions * Drum hit"s * FX panel * Expertly programmed beats * Live drum loops * Upright bass lines * Rhodes riffs * Mac OS X or later