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Garmin GPSMap 60CS - Cannot upload maps from SD Card

Hello,

I am trying to upload Garmin BlueChart maps to my Garmin GPSMap 60CS. The Unit does not have an SD Slot.

I have the BlueChart maps on the SD Card including unlock code.

I have install MapInstall software, I have added the map to the Unlock codes section but still says
"No unlocked maps were found for this device."

I seem to be going around in circles. Please help

I am running MacOS BigSur.

thanks