Required Change In your .csproj file, remove the targets for the platforms you aren’t building for, reducing it to the following: <TargetFrameworks>net6.0-maccatalyst</TargetFrameworks> <TargetFrameworks Condition=”$([MSBuild]::IsOSPlatform(‘windows’))”>$(TargetFrameworks);net6.0-windows10.0.19041.0</TargetFrameworks> Optional Changes In your .csproj file, remove the supported version information for the platforms you aren’t building for, reducing it to the following: <SupportedOSPlatformVersion Condition=”$([MSBuild]::GetTargetPlatformIdentifier(‘$(TargetFramework)’)) == ‘maccatalyst'”>14.0</SupportedOSPlatformVersion> <SupportedOSPlatformVersion Condition=”$([MSBuild]::GetTargetPlatformIdentifier(‘$(TargetFramework)’)) == ‘windows'”>10.0.17763.0</SupportedOSPlatformVersion> … Read more