Hello! Need help to install (Open)RCT2

[Hark]

Hello there,
i've been playing RCT 2 nearly all my youth and was super excited when i saw this project! I#Ve been trying to install RCT2 / openRCT2 (I've already bought the original game twice) several times following your instructions and numerous YouTube-Video. Unfortunately it isn't working yet. 

I've tried "PlayOnMac"; "Steam", Extractor... I don't even dare to ask but could someone help me? Or is there another guide than the one i found on your website? I am a native german speaker..

[Gymnasiast]

We’ll need a bit more information about your system and RCT2 install. From your description, you seem to be on macOS, but which version are you running? And where did you buy RollerCoaster Tycoon 2?