macos/README.md bug error during execution of pip install docker==5.0.0 ...

### Environment details:
Mac was used, but this applies to ANY OS.

### Steps to reproduce the issue:
Follow all (mac) instructions to prepare the system.

When you execute the last command to install the prerequisite:
"pip install docker==5.0.0 ansible==4.1.0 jinja2==3.0.1 couchdb==1.2 httplib2==0.19.1 requests==2.25.1 six=1.16.0"

the terminal answer with the following error:
ERROR: Invalid requirement: 'six=1.16.0'.

### Provide the expected results and outputs:
command pip install finished successfully.