Wow…I didn’t think the ZTimelapse was going to cause the issue. Finally I can use ZApplink 
Thanks a bunch
okay, i was ripping my hair out trying to get ZApplink to work on my mac. I fixed it by changing the name of my ZBrush 2 folder from “ZBrush <space> 2” to “ZBrush2.” It’s weird that one little space makes such a problem.
The way ZApplink works is still a little strange. After making the changes to the Photoshop file and going back to ZBrush it says “Back to external editor” (or something like that.) Then, I have to go back to PS one more time before the changes take effect. When switching back to ZBrush one more time it asks if I want to confirm the changes. Weird…but it works, and I’m happy! 
Hope that helps someone out there.