Ah okay thanks! I didn't understand at first that you had to build the RCPCustomComponents scheme with the MyMac as the target, I was trying to build using the game's scheme. It would be great if Apple could post a from-scratch walkthrough of how to set this up on a new project rather than copy/pasting from the one sample project.

@masaldana2 can you explain the steps you used? I'm still struggling to figure out the RCP custom component build process.