Thats strange… It works on my imac with mojave but not with my macbook pro with high sierra 
try updating your macbook to mojave if supported. i assume you already done it
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I just did and it doesnt work :-/ its no matter i can install parallel and windows 10 to use msn on it or only use it on my windows pc xD thank you
or you can use bootcamp and install it alongside macOS. 
just dont update it to catalina
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