Hey, so i was having all the same issues with the Fresh software on my Macbook Pro. So I downloaded the Beta version on my iMac, connected my M+M to it and WA LAA it worked, updated with no problems. However now it seems to have gone back to normal, every time I connect it it pops up an error message.
Similar issue here - using Fresh on a Mac won't recognise the M&M, neither using the current version of the software nor the beta version linked to above.
So (again) I've had to boot up Parallels on my wife's Mac to update the M&M. It's a bit of a pain, not least because my wife's Mac is set up for her business and I'm not really supposed to use it to download bits of software - she'd be furious if something went pear-shaped.
I'm surprised Navigon can't seem to get this to work reliably. But I'm hoping updating the M&M software will cure my iPhone BT streaming issue.