Have a MacBook Air running El Capitan and an iPhone 5C running 10.2.1. Have had some notes in Notes on my iPhone for quite awhile, and thought that they would automatically synch on to the MacBook Air. Discovered tonight that they have not. So I called the Apple Rep to find out how to do that. She said that first I would have to upgrade the MacBook to Sierra (which I am not keen on doing) and upgrade the iPhone to IOS 10.10.3.2 (which I am also not keen on doing). My lack of "keenness" is that my MacBook came with El Capitan. I believe I have read on MacRumors that whatever a clean upgrade is might be necessary; this scares me. My iPhone 5C keeps getting slower with every new IOS upgrade, so I am loath to upgrading that. Can anyone (1) tell me if/how it is possible to synch Notes between my Mac and my iPhone without these updates, or (2) allay my fears about making these updates? Thanks!