Does the EOS Utility 3.17.2 not work? It doesn't list Mac OS 14 as being supported (I run Mac OS 13.5) but could be worth trying... https://www.usa.canon.com/support/p/eos-r5#idReference%3Dsoftware-drivers
FW 1.9.0 has been horrible experience for me on my R5. Same battery issue with Canon OEM batteries, camera black screening, camera locking up - only fix to pull the batteries.. I also run the BG-R10 grip and the R5 Control Ring Mount Adapter. Not a g...
