I’ve managed some testing today, but it will take time for me to make a coherent statement about the findings. I have managed to get a version 2.3 client to run on an Intel processor running MacOS 15.4 (an iMac), on a M3 Pro laptop running MacOS 15.3.2 and MacOS 15.4.
The ARM version of the client crashes on the M3 Pro laptop on both 15.3.2 and 15.4. However I ran the V2.3 client build for Intel (x86) processors on the M3 Pro machine - and that ran on both versions of the operating system.[EDIT: Issue identified and solved by Julian in post 7. I have found 1 small oddity so far - when the 2.3 Intel client runs on the M3 Powerbook the F3 keys issues a LOADBG instruction to the CasparCG server instead of the expected LOAD.
The same client on an Intel processor with OS 15.4 issued a LOAD command as expected.]
So hopefully the Intel 2.3 build could work on both your Mac Mini and your ARM laptop.
I know this is April Fools Day - but this is not a joke!!
Andy