MacOS – “__git_ps1: command not found” from running “/usr/bin/env bash”

Your prompt is messed up, specifically PS1:

PS1=$[\033]0;37m]

that's missing a lot of escape characters (\e[) needed for the colors (and most useful parameters for a PS1). That's also why you get the 37m in the terminal window title. Try setting it to something different by running:

export PS1="\e[0;31m[\h:\W \u]\$\e[m "

and see if that works. It should give a red (thats \e[0;31m) prompt showing hostname (\h), current working directory (\W) and logged in user (\u) inside brackets [] and the bash exit status of the previous command (\$). Note that at the end the color is reset to the default of the session with \e[m .

If the above worked, you only have to find out from which configuration file your "bad" PS1 comes from: look for an "export PS1=" line in ~/.profile, ~/.bash_profile, ~/.bashrc, (as M K already suggested in his answer) and put in the above version.

There are a lot of answers around here with helpful colors codes and inputs for configuring the PS1, like this one for example.

Modify the file .bash_profile with nano or another appropriate editor:

Replace:

export PATH=’/usr/local/bin:?? 
# Setting PATH for Python 2.7
# The orginal version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}"
export PATH 

by:

# Setting PATH for Python 2.7
# The orginal version is saved in .bash_profile.pysave
export PATH=/Library/Frameworks/Python.framework/Versions/2.7/bin:$PATH

Explanation:

The first line of your current .bash_profile

export PATH=’/usr/local/bin:?? 

modifies the standard value of $PATH given by /etc/paths from

/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin 

to ’/usr/local/bin:?? - which is no valid path.

The fourth and fifth line of your current .bash_profile modifies $PATH to

/Library/Frameworks/Python.framework/Versions/2.7/bin:’/usr/local/bin:??

Since ’/usr/local/bin:? is no valid path the finally effective PATH is

/Library/Frameworks/Python.framework/Versions/2.7/bin

which completely breaks your standard PATH. You can still execute all executables in the above directories but you can't omit the superior directories (e.g. to execute nano you have to enter /usr/bin/nano instead of nano).