User283571144 posted
Hi Akvile.Petra,
Any ideas on what it could be?
According to your description, I couldn't understand your issue clearly.
Do you mean you couldn't access the login control in the page in mac OS system safari which application is hosted on the windows or you want to host the asp.net application in the mac OS system?
As far as I know, the .net framework doesn't support mac OS system.
So we couldn't host the asp.net application on the mac OS system.
If you want to host application in the mac os system, I suggest you could consider using asp.net core.
More details about how to use asp.net core, you could refer to below article.
Notice: The asp.net core doesn't support web form.
https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-web-api-mac?view=aspnetcore-2.1
Best Regards,
Brando