I was using the network "Ultimate Poser Vault" resource approach for a while, and didn't realize the major pitfall of using such a scheme, and that is, the file you create on the Windows CANNOT BE read properly on the Mac, and vice verse. That is because of the way how Mac and Windows store the network path on the daz file.
So starting from now I am using a different approach. I copy the whole "Ultimate Poser Vault" content to the "content" folder of the corresponding Daz installation folder on both Mac and PC. The result is that the file I created on my Windows Daz Studio shows up properly on my Mac Daz Studio. Yeah!