Compatibile MAC version to open premiere elements 8 projects?

Hello,

I have a problem finding a MAC version of premiere elements that is capable to open my old premiere elemets 8 projects (PC version). I have tried the latest version 13 and the result was "not compatible". After that I bought version 9 for mac on ebay. Version 9 starts to open the projects but gthen also states that it is not copmpatible.

Has anyone an idea how to open my version 8 projects on my new Mac? Thank you!