Mac support for Elliptical Curves?

I'm trying to integrate cryptography into a native mac port of another app, but Im stuck trying to find an alternative. docs.microsoft dotnet/api/system.security.cryptography.eccurve.namedcurves shows that it is not implemented but only for mac. Is there any way I could write my own version or is there a reason this doesn't work? I'm trying to use eccurve to create the ecdsa class and use its verifyData function.