You open Logic Pro, load an instrument track, insert EZdrummer 3 as a plugin... and a pop-up says "No sounds found. Please locate your Core Library."

Have a question about installing EZX expansions? Drop a comment below or check our guide on authorizing Sound Libraries on multiple Macs.

So, you’ve just purchased Toontrack’s EZdrummer 3 . You’re excited to ditch those stock Logic or Ableton samples and get those professional, mix-ready drum sounds. But after the purchase confirmation email arrives, you might be staring at a download manager, scratching your head.