Signing Mac App in Visual Studio for Mac (Xamarin)

Question

I have a Mac app, created in Visual Studio for Mac. Before distributing, I would need to have the application bundle signed. However, looking at the project options, this is greyed out on my screen:

According to https://docs.microsoft.com/en-us/xamarin/mac/deploy-test/publishing-to-the-app-store/signing, I should be able to select it and pull the Developer ID certificate from the keychain (which is present).

My question is; what causes this option to be greyed out?

The yellow triangle doesn't give any hint:

Answer 1

I was creating an installer and therefore assumed I needed the 'Developer ID Installer' certificate. However, it needed to be the 'Developer ID Application. After having that one in the keychain, the box became available.

Answer 2

For me I had also to create a 'Mac Development' certificate.