Thank you Karel for your quick answer.
In April I installed the RoomPacks and the RoomPack Data Folder was set to: /Volume/HD2/MIR
It works fine.
Yesterday I installed VE PRO 11716 on my Mac Pro and it doesn´t work. But on MacBook Pro it works.
Now I have set the RoomPack Data Folder on my Mac Pro to: /Library/Application Support/VSL/Vienna MIR
It´s the same path as on my MacBook Pro and now everything works fine again. Strange is that I had to change the path now.
I want to thank you very much for the help
Klaus