Here is an extract from terminal, I followed the steps from the readme provided by the Mozilla release page:
(base) Chabanis-MacBook-Pro:~ chabani$ virtualenv -p python3 $HOME/tmp/deepspeech-venv/
Running virtualenv with interpreter /Users/chabani/Desktop/Scribe/anaconda3/bin/python3
Already using interpreter /Users/chabani/Desktop/Scribe/anaconda3/bin/python3
Using base prefix ‘/Users/chabani/Desktop/Scribe/anaconda3’
New python executable in /Users/chabani/tmp/deepspeech-venv/bin/python3
Not overwriting existing python script /Users/chabani/tmp/deepspeech-venv/bin/python (you must use /Users/chabani/tmp/deepspeech-venv/bin/python3)
Installing setuptools, pip, wheel…
done.
(base) Chabanis-MacBook-Pro:~ chabani$ source $HOME/tmp/deepspeech-venv/bin/activate
(deepspeech-venv) (base) Chabanis-MacBook-Pro:~ chabani$ source $HOME/tmp/deepspeech-venv/bin/activate
(deepspeech-venv) (base) Chabanis-MacBook-Pro:~ chabani$
(deepspeech-venv) (base) Chabanis-MacBook-Pro:~ chabani$ $ pip3 install deepspeech
-bash: $: command not found
(deepspeech-venv) (base) Chabanis-MacBook-Pro:~ chabani$ pip3 install deepspeech
Requirement already satisfied: deepspeech in ./tmp/deepspeech-venv/lib/python3.7/site-packages (0.5.1)
Requirement already satisfied: numpy>=1.14.5 in ./tmp/deepspeech-venv/lib/python3.7/site-packages (from deepspeech) (1.17.0)
(deepspeech-venv) (base) Chabanis-MacBook-Pro:~ chabani$ pip3 install --upgrade deepspeech
Requirement already up-to-date: deepspeech in ./tmp/deepspeech-venv/lib/python3.7/site-packages (0.5.1)
Requirement already satisfied, skipping upgrade: numpy>=1.14.5 in ./tmp/deepspeech-venv/lib/python3.7/site-packages (from deepspeech) (1.17.0)