Nice, helpful guy from Apple Support tried to help me with a problem that recently showed up where Notes on Yosemite/OSX 10.10.5 no longer syncs to iCloud. Calendars still does, however (as does Notes on my iPhone 5s iOS10.1.1). My settings are correct as far as we could determine. Something either has changed with a recent OSX update on my aging 2011 Macbook Air 11", or some change happened in Sierra/iCloud that has left Notes under Yosemite in the lurch. Support Guy offered upgrading to El Capitan -- but that didn't work, because 10.10.5 can't upgrade to the current verison of El Cap! Instead, I have to upgrade to Sierra, which is a bummer. I fear OS bloat will choke my veteran Air, though supposedly all my main apps will be fine from the research I have done. Any other Yosemite-adherents notice Notes not syncing anymore? Maybe there is a third-party Notes-like app that I could still use to sync between my Air and iPhone? Advice appreciated.