MacOS - How to manage all startup programs

Look into each of these four areas:

1. System Preferences > Accounts > Login items
2. Finder, user root > Library > StartupItems
3. Finder, disk root > Library > StartupItems
4. Finder, disk root > Library > LaunchAgents

Python - How to install a module/plugin (setup.py)

(1) Download.
(2) Unpack (unzip).
(3) Open Terminal (command prompt)
(4) sudo python setup.py install