hi Danne, sorry i don't quite follow the instruction you shared. i did download that eos 6d command but it gave me the "insufficient access" error message.
I believe the intent of this command file is to change the camera model for the converted DNG files from 70D to 6D, and once this command is run I'll reopen the DNG file and see how it looks like?
Anyway, i googled and found some instructions on changing the model using exif -
1. go to Terminal, and navigate to the folder containing the DNG files
2. type 'exiftool -l <dng file name>' - it shows model = Canon EOS 70D
3. type 'exiftool -MODEL="Canon EOS 6D" to change the model to 6D
4. type #2 again - this time the camera model is showing Canon EOS 6D
However, when i tried to open the DNG file in Photoshop - which opens ACR - it still reads it as Canon EOS 70D
Appreciate your input!