In the past few years I’ve been excited to celebrate Photoshop’s 20th anniversary, with Corona’s Photoshop 1.0 app for the iPhone and the release of the Photoshop 1.0 source code. As a teacher of the current version, and a hacker of all things around me, I’ve been meaning for a while to get Photoshop 1.0 up and running on a modern Mac (running OSX 10.8). Here’s how you can too: