I installed Yosemite on my MacBook Air today and for a while I was able to receive calls from my iPhone 6 through my MacBook. Now it's not working. I thought that this feature wouldn't be available until I was able to upgrade to iOS 8.1 on Monday so I was shocked to be able to hear the call and see the widget on my MacBook screen. Should this be working already? Or was this just some kind of mistake? If this feature should be enabled already then why isn't it working anymore?