Clicked open with and then System Profiler, because it looked somewhat important. I got just a little impatient, because nothing was working and I didn’t know what I was doing ect. Err well ummm After I posted the comment. Now load GarageBand, and start the record mode and press some keys on the keyboard. To test it installed correctly, run ‘Audio MIDI Setup’, and click in the ‘Windows| Show MIDI Window’ top level menu Then click the ‘Test Setup’ icon to make it blue (shown white here) Then click on the down arrow at bottom of the Casio USB MIDI Interface. For Snow Leopard there is an installer package now on the above linked driver, so use that for Snow Leopard installs. Now I’m interested to see what the kids will create. Tada, the Audio Midi Setup (Applications/Utilities) could see the keyboard, and could record the input. copy driver ugin to the root driver folder /Library/Audio/MIDI Drivers (so all users accounts can use the driver).After a few minutes Googling I found that Casio only provide Windows drivers But then I found a GoggleCode project to provide. Yesterday I found the required USB cable to connect my MacBook to the keyboard we purchased for the “kids”.