Debugger called: Backtrace, Format - Frame : Return Address (4 potential args on stack) 0x13e43b34 : 8............................. etc etc etc Kernel loadable modules in backtrace (with dependencies): com.apple.driver.AppleUSBUHCI(2.4.6)@8x2a249888 dependency: com.apple.lokit.IOUSBFamily(2.4.6) dependency: com.apple.lokit.IOPCIFamily(2.8)