The answer appears to be running the following to install the missing ‘future’ module (should be listed in psychopy dependencies)…
sudo pip2 install future
Then you can run…
python -m psychopy.app.psychopyApp
You could run this from the Mac OS console, or from CMD, a Terminal or using Alt+F2 on many Linux desktops, for example.
On my Ubuntu Linux machine, for my personal preference of running as a background process and not closing down when I close the terminal window I run the following from the console…
nohup python -m psychopy.app.psychopyApp &