My previous Terminal Tweaks post had an incorrect prompt (PS1) setting, that caused lines to wrap on themselves! This is now corrected, with more details on the color options...

Forget the complex or manual steps, or costly tools to get screen shots scaled down from a retina display. I have a shell script that triggers an interactive window screen capture, saves the screen shot (assumed to be 2x retina display), re-sizes it to 1x and compresses the PNG further! Best of all, it does not require paid software or Automator.

Some tweaks to my OS X shell (Terminal.app) that I've found useful.