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FR70 unable to connect to Garmin Express - The specified Unit ID is invalid.

Former Member
Former Member
Just had an FR70 bought for me for my birthday and am trying to connect it to my Mac. I have downloaded Garmin Express and it can find the device but then has nothing displayed in the Serial Number: section and states "The specified Unit ID is invalid."

It won't let me do anything else other than ignore it.

Any ideas how I can make this work?