Notes won't sync between iPhone & MacBook Pro.

what do you mean?

Mine isn't working but I'm on Mac Os Sierra and 10.1.1 iOS on my iPhone...?

Your Notes is already upgraded given the OS/IOS version you are using.

yet it is not working properly.

Given the date of the original post, I recommend you start a new discussion in the Sierra community. You can link to this one. Make sure you clearly state your problem and what steps you have taken in an attempt to resolve it.

I have solved mine after having sync problems of notes. I have 3iphones and macpro with same apple id. Most of the time they are sync upto date but sometimes they are delayed for days or out of sync forever. I made them all sync by playing with them and somehow finally now they are all sync'ed. How? Made sure all devices are upto date with latest OS version, made sure all notes are sync "on" at Settings iCloud, all the devices are reset by turning them off and back on. then from my mac pro, lunched iCloud.com. Login. Go to notes, and started typing in where some notes were not at sync'ed. Then suddenly I saw all the notes were beginning to sync infront of my eyes instantaneously. I justed wanted them to sync and they worked. I am sure it is going to happen again. Since i did not fixed the problem but i am guessing iCloud sync sometimes get stuck and hunged like any electronic devices. Wish there was manual sync(push) function in notes in case auto sync is not working. Or sometype of refresh.

I'm having this exact same situation. Notes on my iPhone appear on the iCloud web interface, but did not sync with Notes on my MacBook Pro. I've tried removing and reactivating iCloud accounts on all of my devices, but it appears to still consistently have two separate storage areas for what's on my phone vs. what's on my MBP - even when using the exact same iCloud login and password on all devices.

To add to it, when I login to iCloud on the web interface, not only do I see the notes for my iPhone, but it does NOT list my MBP as one of the devices signed into the iCloud account. It does list my Mac Pro desktop, and the iPhone.

So here's where it got weird ... I went to my desktop Mac Pro, open Notes, and it started sync'ing everything - it could see notes from the MBP as well as the iPhone, and after it was done, those all seemed to consolidate together in the iCloud web interface. So now my MBP could see notes from the Mac Pro, and iCloud -- but new notes still didn't sync up from the iPhone.

Eventually I got fed up, opened an account with Simplenote.com, transferred everything there and deleted the Notes app from my iPhone. Sigh.

What OS are you using on the MacBook?

Notes Upgrade

10.9.5 on the laptop - since you linked to the upgrade article, I gather that I need to update my OS X version on the Laptop for notes sync to work again? That seems like a major change needed to solve syncing issues, but thank you for pointing me in that direction.

I've been holding off on upgrading on my Laptop, because I make extensive use of ScanSnap / DevonThink software there which until recently has had major problems with PDF handling under the latest version of OS X.

You are welcome. You need El Capitan or better to get the upgraded Notes format.

Thank you. I have been searching for a solution. Very simple.