I downloaded the PDF from the shared location and checked it on MAC (Lion 10.7). I am able to play the presentation properly.
Please let me know following details:-
1) Which version of Preseter you are using for publishing this presentation and
2) Which Presenter version you used for earlier presentation when there were no cutomer issues.
3) Secondly, on which Mac version do we see this issue?
Another point I want to mention is please ask your users to use Adobe Reader 9 or later for viewing the file. For older version of Adobe Reader is not supported.
First, let me say that Adobe is Apple's largest software development partner and the two work hand in hand every day for product support issues. Yes, Apple does not allow Adobe Flash to operate on their iOS devices becuase of their desire to control the battery experience of their devices. However, Flash is easily installed on most Mac's. So, please don't confuse the Adobe Flash disagreement with Apple as "touchy" for the entire relationship. Adobe is a large customer of Apple and we sell a lot of software through the Apple Store.
Second, the files should play fine on Mac's. Adobe Reader is fully supported on Mac OSX. I do think you may have outdated versions of Reader. Must be version 9 or greater.