Steve,
How do I install Photo Mechanic on to another computer on to my mac book. I already have it on my iMac
Each license of Photo Mechanic allows three activations. If you have only ever installed PM on your one iMac then you have two activations left. Simply install and activate using your license key. If you no longer want PM on your iMac and you want to free up one of your activations then run PM on your iMac, go to the Help menu, then the Licensing submenu, then choose Deactivate computer and follow the prompts.
HTH,
-Kirk