there is a usb connector .exe that youll need to install...had the same problem a few months ago when i was using my n900...im not going to be much help because i cant remember the name of the exact usb connector "plugin" but try searching the forums for "no suitable device waiting" i found it on this site....
Nokia 770 Flasher for Mac OS X ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (c) Andrew Flegg 2005. http://www.bleb.org/software/770/ Released under the Artistic Licence. Mon Mar 5 20:25:30 me.local CocoaDialog[255] <Error>: kCGErrorCannotComplete: CGSDeviceSynchronize: Invalid device window Mon Mar 5 20:25:30 me.local CocoaDialog[255] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged. Mon Mar 5 20:25:30 me.local CocoaDialog[255] <Error>: kCGErrorCannotComplete: CGSDeviceSynchronize: Invalid device window Mon Mar 5 20:25:30 me.local CocoaDialog[255] <Error>: kCGErrorCannotComplete: CGSDeviceSynchronize: Invalid device window Mon Mar 5 20:25:30 me.local CocoaDialog[255] <Error>: kCGErrorCannotComplete: CGSDeviceSynchronize: Invalid device window flasher v0.8.1 (Jun 8 2006) Image 'mmc', size 262089728 bytes Version RX-51_2009SE_10.2010.13-2.VANILLA USB device found found at bus 002, device address 003-0421-0101-02-00 Found device RX-51, hardware revision 2101 NOLO version 1.4.14 Version of 'sw-release': RX-51_2009SE_20.2010.36-2.002_PR_002