Apparently this card reader is not working with Concept 2 Rower PM3 log card for OS X 10.12 (Sierra) - not even after downloading the specific BETA- Driver for Sierra OS X version. The problem (according to Concept 2 website) is that it is an Omnikey 3121 version 3, not version 1 or 2. But the 3121 version number is not listed in any of the descriptions of this product Revain nor is it listed on the device itself.
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