My first SD card was an 8G, which I loaded the software using the DD commands. But it was an old card and the digipi seemed to be running "inconsistently". SO I grabbed newer 32G and 64G cards. I tried loading them with DD and also with BalenaEtcher - no go. The cards always ended up empty as far as macos was concerned and wouldn't boot. I tried two different USB to SD adapters. I finally pulled out my PC, used the same adapter and BalenaEtcher and sucessfully programmed the 64G card, which booted fine and is running fine.
Mac M3 is running the latest OS (26.2) Not sure what the issue is.
mgg