Error installing on MacOS, can't install HAP-python

So, I’ve just installed on MacOS following the instructions from the link below, and I’m getting an error trying to start the HomeKit component - “Component error: homekit - Requirements for homekit not found: [‘HAP-python==2.5.0’].” But when I try to install with " pip install HAP-python==2.5.0" I get an error " error: command ‘gcc’ failed with exit status 1"

Brett

Is gcc installed? What happens when gcc --version from command line?