Just an FYI, PROS doesn’t install on Intel Mac’s anymore it seems (using VSCode extension), the toolchain you try and install from this location is not built for x86_64 darwin as far as I can see, last version for Intel Mac was 14.2.
https://developer.arm.com/-/media/Files/downloads/gnu/14.3.rel1/binrel/arm-gnu-toolchain-14.3.rel1-darwin-x86_64-arm-none-eabi.tar.xz