Xamarin.Mac async and await syntax support

Hello,

I'm not able to compile Mamarin.Mac project while I'm using async and await syntax. I'm constantly receiving error:

Error CS1993: Cannot find compiler required types for asynchronous functions support. Are you targeting the wrong framework version? (CS1993)

Is it possible to use async/await syntax in Xamarin.Mac projects? And if yes, could somebody, please, send me compilable example of Xamarin.Mac project with async/await?

Guys from support answered that async/await syntax should work in Xamarin.Mac project type.

Thank you.