Sorry but PC and Mac project files are not interchangeable. The best you can do is to export them from your PC project as new source files and load them into a new Mac project. But you won't be able to edit any effects you added in the PC project, they will just be source clips.
Insanity is hereditary, you get it from your children
I'm not sure about that. I just created a new project and only imported .mov files in it.
I again exported them via the archive manager and the project opens fine on my mac.
So I think it's only related to the AVCHD files.....
I managed to fix this. With help of Adobe live chat, the support employee asked me if I've copied the .mts files out of the AVCHD content folder and relinked them while opening the project.
I had tested this, but the premiere form got totally white so I expected it went wrong.
After the chat I retried this and again the form got white but after a few minutes, the timeline etc returned and the project is fine.
I haven't noticed any problems with the project, so the are interchangeable between Windows And Mac.