I've had no issues updating on PPC and Intel Macs ... from 770 through to N810 with the 770 Flasher app. Best way I know is: 1 - Back up. 2 - Power Down 3 - Start up 770Flasher, accept the warning 4 Connect USB Cable to the tablet and when pressing the power on, hold the home key. You don't have to hold the home key, but I've found it makes the flasher connect more reliably. 5 - Watch it go! Takes less than a minute. You can see it in action here - (second video) http://www.maemoapps.com/2007/04/12/...ody-installed/ Also - 770Flasher is available here: http://www.bleb.org/software/maemo/