Have followed up to https://home-assistant.io/developers/development_environment/#setting-up-virtual-environment-optional and on running python3 -m venv venv am receiving the rather unhelpful:
Robins-MacBook-Air:home-assistant robincole$ python3 -m venv venv Error: Command '['/Users/robincole/Documents/Github/home-assistant/venv/bin/python3', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1
I have anaconda on the same machine, I’m not sure if this could create a problem…?