Add note that you may have to click the lock to unlock the preference panel.
Add one more button to the instructions.
Skip the readme—it is confusing
Add explanation of Spotlight
Add explanation of 'ls'
Add explanation for 'pwd'
Add explanation for 'root' directory and 'cd'
Move explanation before command
Break out the instructions for nix and windows
Add explanation of Users directory
Repeat reference to 'pwd'
Add explanation of the parent directory
Reinforce the '/', 'root' connection
Add the 'terminal' synonym
Switch tabs to spaces
Add that ctrl-c only works in Windows