Garmin Express Reports Not Enough Space On 67i w/32GB card to Load City Navigator NT

Have a brand new GPSMAP 67i and purchased City Navigator North America NT mapping for download via Garmin Express, and Outdoor Maps+ subscription. 

Installed a 32GB card in the 67i. 67i sees the card, can DL Outdoor Maps+ to the 32GB card.

The CN-NANT will not DL. GE returns an error, saying that there is not enough space on the device, free up space and try again. The 67i came with topo maps preloaded on the installed device storage space. The device clearly sees the 32GB card, uses it for the Outdoor Maps+, but will not allow CN-NANT to be installed on the 32GB card. There is ample space on the card.

Anybody else have this issue and how did you get CN-NANT to download and install on the card?

FYI, I've been using GPSMAP devices for decades, this 67i might be my 5th or 6th GPSMAP, all managed with Mac computers. 

According to all the Garmin documentation, the 67i is compatible with Mac and the CN-NANT mapping, just as previous GPSMAP products. 

Thanks in advance.