In order for you to play Mystery of Neuschwanstein on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mac OS X Lion 10.7.3
Processor (CPU):
Intel Core 2 Duo Prozessor 2,66GHz
Memory (RAM):
1 GB RAM
Graphics Card:
ATI Radeon HD 2600 Pro 256 MB
Storage:
350 MB available space
Sound Card:
recommended