i've been using my X3Live with my macbook for years with no problem.  however, ever since the last line6 monkey/driver/flash update, it will no longer communicate via USB.  Gerbox also won't work with the X3 anymore.   I was able to get connectivity working again by downgrading monkey to 1.31 and the gearbox back one version to get older drivers, and now everything is fine on one computer and connectivity/gearbox/usb is working.  however if monkey or gearbox updates to the new version everything stops working again.  i looked on the forums and a lot of people with similar mac setups recently have been having the same problem sio i don't think anything is wrong with my x3live.