[URL="https://itunes.apple.com/in/app/downcast/id668429425?mt=12&at=10l3Vy]Downcast[/URL] also has a Mac client. So does Instacast. Although [URL="https://itunes.apple.com/in/app/instacast/id733258666?mt=12&at=10l3Vy]Instacast[/URL] looks like it hasn't been updated in years. Still, works well. Both apps will sync data and positions with the respective iOS app.