Bob,
It sounds like the EOS Utility is trying to automatically download pictures from the card for you. Kill the EOS Utility.
Now when you connect the card reader, it will show as a removeable disk in Finder.
Open the card reader so the folder display DISM, and Misc. Move or copy the the .FIR file to the same directory where they exist. This is the root or top level.
You want it to be at the same level, and outside of the DCIM, Misc folders.
When done, the card will show DISM, Misc and EOSR5170.FIR
~Rick
Bay Area - CA
~R5 C (1.0.9.1), ~R50v (1.1.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve Studio ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
