Why are you asking in Adobe's InDesign forum? Adobe is not part of Apple, and InDesign is not for designing screensavers with.
My mistake. I did try to get help from Apple's tech support line; even
emailed a supervisor who's email I have regarding my needs and questions
regarding mosaic software, but I didn't get a reply.
Would you be able to suggest a route for my research on mosaic design?
Thanks for your time.