If you run the newest version of Monkey 1.56, and have green ticks for everything, then I would submit a support ticket. It seems they still have some bugs to work out on the Mac drivers.

You can contact Line6 directly via a support ticket or phone:

http://line6.com/support/tickets/add.html

Line 6 - North America Line 6, Inc. 26580  Agoura Road Calabasas, CA 91302-1921 Main Phone#: (818) 575-3600 Main Fax#: (818) 575-3601 Customer Service hours are 8am - 5pm M-F Pacific Time Press option 3 for Customer Service Our busiest hours are from 11am to 2 pm.

Line 6 - Europe Line 6, Inc. The POD Clifton House Butler's Leap Rugby, Warwickshire United Kingdom, CV21 3RQ Telefone: +44 (0) 1788 566 566 Fax: +44 (0) 1788 566 529 Technical Support: +44 (0) 1788 566 555, Mon-Thurs 9am – 5pm GMT and Fri 9am – 4pm GMT

Yes the same thing for me.

Been using windows for years... finally broke down and bought the best Macbook pro available

downloaded all the latest drivers and same as you... when I plug in and turn on ... no problem...

the minute I choose a sound it turns off completely... From all the posts I am seeing this is the

case for everyone. SO WHEN WILL LINE6 GET THIS FIXED???

Same issue, same computer, same interface. It's driving me nuts. I installed a flash update once and it seemed to "fix it" for a bit, but perhaps that was just a coincidence. The thing is still broken for me, though.