…because for some reason installing P4V doesn’t install the command line tool (and I’m tired of having to Google it).
- Download the command line client from Perforce – http://www.perforce.com/downloads
- Copy the downloaded file to /usr/local/bin/
- Make the file executable by running the following in Terminal
cd /usr/local/bin/
chmod +x p4
Why Perforce can’t provide a P4 install is beyond me…
Engineering Game Development 
I’m going to annoy you now:
> brew install p4
https://github.com/mxcl/homebrew/blob/master/Library/Formula/perforce.rb
Now there’s two ways to install P4 on Mac on here. Cheers 🙂