Which version of Director are you using? If you are using Director 11 or 11.5, then FileXtra4 will not work on Macs. And it will not always work on PC. This xtra was never updated when DIrector's format changed in Dir 11.
If you are using Directo MX 2004 or earlier, then you should be able to simply download the Mac version of the xtra from the site and unpack it ON A MAC. Put it in an external xtras folder (where the xtras folder is in the same folder as the projector). Then burn the files (again, on a Mac). If you ever put the unpacked Mac xtras onto a PC filesystem, then they will no longer work.
Ah, I see from the filepaths you posted that you are using Director 11. So, that means you absolutely can not use this xtra if you want to make a Mac version. I would recommend using BuddyAPI which has all the same functionality, it generally easier to use, and is being actively developed.
Mike, thank you very much for your answer.
I am using Director 11.5 on PC. FileXtra4 works fine on PC. The PDF file opens normally.
But when I run the .app on Mac, the FileXtra4 doesn't work.
I will try BuddyAPI that you recommend to me.
I hope that my problem will be solved with that.
I will inform you.
Thank you again.
Mike, BuddyAPI works perfect!!!
The only thing I am worried about, is its registration.
Do I have to register, do I have to buy it to use it?
Thank you very much for your helpful advice.
The license for BuddyAPI states that you can use up to 2 commands in any projector for free. So if you use only one or two commands from BuddyAPI, you do not need to register or pay for it. If you use more, then you will need to purchase it and register it.