Hi Frank:
Welcome to RetouchPRO.
If you haven't yet and if no one answers your question directly on this forum anytime soon, I'd recommend checking out the Mac/Photoshop forum at
www.Adobe.com. Do a search using keywords such as "Picture Package" and "[a specific keyword or two" from the error message you're getting.
If you don't get any matches on the forum Adobe search, then I'd recommend registering (so you can post questions) and post your question (and specific error message verbiage) there. I cannot imagine you're the only Mac user (to date) to have experienced this problem.
Don't construe the suggestion above as a "you're not welcome here" or "don't post this kind of question." Just trying to give a possible path to pursue until someone comes to the rescue at RetouchPRO!
Hope this helps...keep us posted as you make progress.
~DannyR~