Since I upgraded to OS X Yosemite, I, like many other Mac users have been issues with bluetooth and wifi interference. As updates have rolled through, my problems with using my Bluetooth Apple Magic Mouse and the wifi connections at work just haven’t been resolved. I searched the web and tried a whole list of things, but nothing worked. I narrowed the wifi connectivity issue down to an issue with using the Bluetooth Magic Mouse by simply turning off the wifi, which stopped the wifi connection dropping. While Bluetooth is turned off, I have no network and Internet connectivity issues.
After searching the forums, I discovered that the real issue causing the Bluetooth-wifi connectivity problem was FaceTime. This application when activated was causing issues with both my Magic Mouse and my wifi connection. The solution? Turn off FaceTime. It worked! While it seems like a great idea that I be able to text and answer calls on my MacBook, being able to have a solid connection to wifi and being able to use my Bluetooth mouse is much more important to me.
So, if you are like me and are having bluetooth and wifi issues, you may be able to resolve the problem by simply turning off FaceTime.
UPDATE: My fix above stopped working. Apparently, the wifi frequency and the bluetooth frequency still interfere. I gave up and purchased a regular USB wireless mouse. So for the "magic" in Apple's Magic Mouse.