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Usb is busy
I tried VMWare and my Garmin 496 and it works just fine. I wished Parallels would explain why they won't fix this anytime soon.
USb device is busy
I had just started another thread n this when I found yours. I'm in the same boat and have to use Boot Camp to update my 496....
This thread was moved from "User Solutions and Workarounds".
Useful thread - here.
I too have had the same problem of Windows telling me that the usb device is in use by another application since using version 2.5. Same problem...