I am using an open source app for MacOS. This app is also distributed through the Apple App Store. This app is meant to replace some built in OS functionality.
It recently came to my attention that this app, rather than provide it's own icons, references icons that are provided with the OS. Keep in mind that the app doesn't redistribute the Apple icons, it just references their location.
Is this a violation of Apple intellectual property rights? Does it violate any Apple developer agreement that would have been required to publish to the app store?