I use notes a lot on my iPhone and my iMac. I'm running the latest Yosemite OS and iOS 9 on my phone. The notes sync fine from the phone to iCloud in both directions. This leads me to believe that something recently changed on my iMac. There have been a few software updates and it looks as though the notes stopped syncing about a month ago, (since that's the most recent note I see from my phone). I Googled until I was seeing double, then decided to just ask the experts here. I have done all the preliminary things that were suggested in Google like... unchecking, deleting and re-checking the notes in my iCloud settings, signed on and off iCloud on all devices. Nothing seems to work. Anyone else ever have this happen?