I seem to be getting the following when I execute npm install bower -g
npm install bower -g
/usr/local/share/npm/bin/bower -> /usr/local/share/npm/lib/node_module
If you have a 'non standard' installation, you need to find the node bin location location with:
npm config list
Then add the node bin location to your ~/.bash_profile
~/.bash_profile
export PATH=:$PATH
Remember to open a new terminal to test, or source ~/.bash_profile
source ~/.bash_profile