Notes no longer sync from iOS (iphone and ipad) to OSX (macbook)
Once upgraded, iOS 10.x notes won't sync with OS X 10.10 any more.

Apple has added new features to Notes in iOS 9, and again in iOS 10. Because of these new features, iOS 9 Notes cannot be synced to OS X version before 10.11 (El Capitan), and - as far as I remember - iOS 10 Notes cannot be synced to OS X before 10.12 (macOS Sierra).

Your iOS device had probably warned you before upgrading your notes, but you might have forgotten about that.