I have a very well-equipped Hackintosh that has been my daily driver for the last 3 years. I've upgraded from Yosemite to El Capitan to Sierra without any issue

I have a very well-equipped Hackintosh that has been my daily driver for the last 3 years. I've upgraded from Yosemite to El Capitan to Sierra without any issues, even when using the official upgrade method via iTunes. It sleeps, has working Bluetooth; FaceTime works too. It's incredibly stable. I also have a pair of rMBPs. I dual boot with Windows 10 so I can game when I want to. It's all about getting a very compatible motherboard. If you don't do your research, it's going to be a battle.