Hi Bert,
first of all – sounds like you did it all right, so lets do a chross-check.
what will happen, if you try burning a BD from within FCP X? will THIS disc be played within your player?
I would not create a disc-image or burn from within encore, I would use toast to burn the blu-ray using the “burn from HDMV”-option.
these two files normally would be 2 folder:
1. BDMV
2. Certificates
you´ll find some more folders+files within the BDMV-folder and some files within Certificates.
both folders (and their content) are necessary for BD-playback.
according to software-playback on mac: there is no certified BD-player available for it. it´s only available for windows!
what kind of media you are using? I would advice only to use high quality media liek tajo yuden or verbatim.
cheers
danny