Update on this. I found out in another thread how to do a clean uninstall. I reinstalled Flash this time there was not a list of errors like when I installed over the top of the existing program. But, the problem is still there. I made a small test file in case the original file was damaged. If I export the mac app I get that the file was damaged only on the lastest OS. This happens when the file is unzipped on a Mac. I need to be able to export Mac projectors. Why is this not working anymore? The previous projectors I exported are working on the newest OS.
Thank you for providing us with your solution. It will help other users that visit this post in the future.
What solution? I can no longer export a Mac app that will work. I gave up.
Just came across this problem as well - had previously worked fine on many occasions with no changes to my process or software.
Good news is I found a work around, it's a bit of a procedure for the client to have to go through, but it works: How to get Flash projectors exported from PC for Mac to work on OSX
Hope that helps!