Messages on Mac not syncing with your iPhone: the 2026 fix list

When Messages on your Mac stops matching your iPhone, the fix depends on what’s missing. New blue-bubble messages that never reach the Mac point to your Apple Account or address settings. Missing green-bubble texts mean Text Message Forwarding is off. Missing history, wrong unread counts or deleted messages that come back point to Messages in iCloud. Work through the fixes below in order, from a 10-second status check to signing out and back in.

The steps use the menu names in Apple’s current Messages and iCloud guides (checked 20 October 2026), which apply to macOS 26 Tahoe and macOS 27 Golden Gate and recent iPhone software; labels can differ slightly between versions. We also include fixes Mac users report on Apple’s forums for macOS 26.

How Messages keeps your Mac and iPhone in step

Three separate systems are involved, and each fails in its own way.

1. iMessage delivery. Every device signed in to iMessage with the same Apple Account receives new blue-bubble messages directly, as long as the address they were sent to (your phone number or email) is turned on for that device.
2. Text Message Forwarding. SMS, MMS and RCS messages (green bubbles) only ever arrive on your iPhone. The iPhone passes them to your Mac if Text Message Forwarding is on, and availability “varies by region and carrier”, according to Apple.
3. Messages in iCloud. This keeps the full history, deletions and read status the same everywhere. Apple says each device must use the same Apple Account, with two-factor authentication and iCloud Keychain turned on (Apple).

Match your symptom to a fix

What you see	Most likely cause	Go to
New iMessages arrive on the iPhone but not the Mac	Different Apple Account, or your number isn’t enabled on the Mac	Fixes 2 and 3
Green-bubble texts never appear on the Mac	Text Message Forwarding is off	Fix 4
Older conversations missing on the Mac	Messages in iCloud off, still syncing, or messages auto-deleted	Fixes 5, 6 and 7
Mac shows unread messages you already read	Read status not syncing through Messages in iCloud	Fixes 5 and 8
Deleted messages come back	Messages in iCloud off on one device	Fix 5
Everything was fine until an update	A bug or a stalled sync	Fixes 8, 10 and 11
Messages won’t send, or show a red “Not Delivered”	Connection, sign-in, or the person isn’t on iMessage	“If messages won’t send from your Mac”, below

Fix 1: Check Apple’s status page

Before changing settings, open Apple’s System Status page and look at iMessage and iCloud. If either shows a problem, wait for Apple to fix it.

Fix 2: Use the same Apple Account in Messages on both devices

• Mac: open Messages, choose Messages > Settings, click iMessage, and note the Apple Account shown.
• iPhone: go to Settings > Apps > Messages > Send & Receive and check that the Apple Account shown there is the same one.

If they differ, sign out of iMessage on the Mac (Messages > Settings > iMessage > Sign Out) and sign in with the account your iPhone uses.

Fix 3: Turn on your phone number on the Mac

Messages sent to your phone number only reach the Mac if that number is ticked on the Mac.

1. On the Mac, choose Messages > Settings > iMessage.
2. Under You can be reached for messages at, tick your phone number and any email addresses you use.
3. Under Start new conversations from, pick the same number or address your iPhone uses, so new conversations start from the same place on both.
4. On the iPhone, check the same addresses are ticked under Settings > Apps > Messages > Send & Receive.

If your phone number doesn’t appear on the Mac at all, check that iMessage is on in the iPhone’s Messages settings and that both devices use the same Apple Account (fix 2).

Fix 4: Turn on Text Message Forwarding for green bubbles

1. On your iPhone, go to Settings > Apps > Messages and make sure iMessage is on.
2. Tap Text Message Forwarding and turn on your Mac.

Your iPhone must be on and connected for forwarded texts to arrive, and your carrier and region must support it. Our guide to texting from a Mac covers green-bubble texts, RCS and WhatsApp in more detail.

Fix 5: Turn on Messages in iCloud on both devices

This is what keeps history, deletions and read status in step.

• Mac: choose Messages > Settings, click iMessage, and select Enable Messages in iCloud. If your version shows a Sync Now button next to it, click it.
• iPhone (iOS 17.2 or later): go to Settings > [your name] > iCloud, tap See All (or Show All), tap Messages in iCloud, and turn on Use on this iPhone.

Both devices need to be on the same Apple Account with two-factor authentication and iCloud Keychain on. While you’re in Messages settings on the Mac, also click General and check Keep messages. If it’s set to anything but Forever, Apple says conversations “are automatically removed after the specified time period” (Apple), which can look like a sync problem.

Fix 6: Give the first sync time, and keep the Mac plugged in

“When you first turn on Messages in iCloud, it may take some time for all your messages to appear on each device,” Apple says. With years of photos and videos, expect it to take a while. Keep the Mac awake, on power and on a good Wi-Fi network while it catches up.

In a long Apple Community thread about Messages not syncing after macOS 26, one user reported that plugging their MacBook into power restarted a stalled sync within seconds, while another found it made no difference. It costs nothing to try.

Fix 7: Check your iCloud storage

Messages in iCloud counts against your iCloud storage, and Apple says that when you run out, “iCloud Drive and other iCloud apps won’t stay up to date across your devices” (Apple). Check how much space is free in System Settings > [your name] > iCloud on the Mac, or Settings > [your name] > iCloud on the iPhone. Free up space or upgrade the plan, then give Messages time to catch up.

Fix 8: Update macOS and your iPhone

Apple fixes bugs in point updates, so install every available update on both devices (System Settings > General > Software Update on the Mac). macOS 27, released on 14 September 2026, makes messages, “read states, reactions, and attachments sync faster” and retries messages that fail to send, according to MacRumors’ macOS 27 roundup.

macOS 27 only runs on Macs with Apple silicon; Intel Macs stay on macOS 26 Tahoe. If your Mac is an Intel model, keep it on the latest macOS 26 update.

Fix 9: Rule out your network

A VPN, firewall, ad-blocking DNS or strict office network can stop Messages from reaching Apple’s servers. Turn the VPN off, or try a different network such as a phone hotspot, then send yourself a test message from the iPhone.

Fix 10: Re-register iMessage on your iPhone

This user-reported fix comes from the same Apple Community thread; the person who posted it on macOS and iOS 26 said it worked for them and for several others:

1. On the iPhone, go to Settings > Apps > Messages > Send & Receive and untick your phone number.
2. Go back and turn iMessage off for 5 to 10 seconds, then on again.
3. Wait for iMessage to activate with your Apple Account, then tick your phone number again.

Another user found that changing the setting on the phone fixed their Mac when re-enabling Messages in iCloud on the Mac had not.

Fix 11: Sign out of iMessage on the Mac and back in

On the Mac, choose Messages > Settings > iMessage > Sign Out, quit Messages, reopen it and sign in again with the same Apple Account. Then repeat fix 3, since signing out can untick your addresses.

If history still won’t download, turn Messages in iCloud off and on for the Mac: deselect Enable Messages in iCloud, and when asked, choose to turn it off for this Mac only. Apple notes you “can choose to disable Messages in iCloud for all your devices, or just your Mac”, and you want just the Mac. Wait a minute, select it again, and let the history download.

If messages won’t send from your Mac (“Not Delivered”)

If the problem is sending rather than syncing, Apple’s checklist for the Mac is short: rule out an outage, the connection, old software, a wrong date and a wrong address (Apple). Work through it in this order:

1. Check Apple’s System Status page for an iMessage outage (fix 1).
2. Check the connection. Apple’s test: the Mac should be able to load web pages and receive email.
3. Restart the Mac, then install any macOS updates (fix 8).
4. Check the date and time in System Settings (Date & Time). Apple asks you to make sure both are correct.
5. Check the address. Make sure you’re sending to the right phone number or email address.
6. Green bubbles go through your iPhone. If Messages says the person is “not registered with iMessage”, or you can’t continue the SMS/MMS conversations you have on your iPhone, Apple says to make sure the iPhone is on and Text Message Forwarding is set up for your Mac (fix 4).
7. Sign-in errors. If the Mac says it couldn’t sign in to iMessage or couldn’t contact the iMessage server, sign out (Messages > Settings > iMessage > Sign Out), restart, and sign back in with the same Apple Account. Apple also suggests checking that account at account.apple.com, and turning off VPN or security software that “could be blocking network ports used by iMessage and FaceTime”, or trying another network (Apple).

What “Not Delivered” means

A red exclamation point with Not Delivered under a message means it didn’t go through. Apple’s advice, written for iPhone and iPad, is to check your network connection, tap the exclamation point and choose Try Again, and if that fails, choose Send as Text Message, where messaging rates may apply (Apple). On a Mac, a text message can only go out through your iPhone, so that last step needs Text Message Forwarding.

If messages fail to just one person, look at their side. They may have stopped using iMessage, for example after moving to an Android phone (Apple tells people who switch to deactivate iMessage). If a blue message never shows “Delivered” at all, their phone may be off, or they may have blocked you. Our guide on how to know if someone blocked you explains what each sign can and can’t tell you.

The last resort, and what not to do

If none of the above works, contact Apple Support before anything drastic.

Some forum posts suggest quitting Messages and deleting the chat.db files in your Mac’s ~/Library/Messages folder so the Mac rebuilds its history from iCloud. It has worked for some people, but it deletes your Mac’s local copy of your messages. Don’t do it unless Messages in iCloud is on and up to date on your iPhone, and you have a current Time Machine backup.

Once Messages syncs: iMessage next to your other chats

If you also use WhatsApp, Telegram or Instagram on your Mac, Tera Chat (our app) can show iMessage in one inbox with them. It reads your Mac’s Messages history locally, which needs Full Disk Access (what that permission means), and sends through the Messages app. That means it shows exactly what Messages on your Mac has: if your Mac is missing messages, fix the sync first using the steps above.

If your problem is finding old messages rather than syncing them, see iMessage search not working on Mac. If it’s WhatsApp that won’t sync on your Mac, see WhatsApp on Mac not syncing. For how iMessage compares with the other networks on a computer, start with the best messaging apps for Mac or how to combine WhatsApp, iMessage, Telegram and Instagram in one Mac app.

The fix list in one place

1. Check Apple’s System Status.
2. Same Apple Account in Messages on Mac and iPhone.
3. Phone number ticked under You can be reached for messages at on the Mac.
4. Text Message Forwarding on for the Mac (green bubbles).
5. Messages in iCloud on, on both devices; Keep messages set to Forever.
6. Time, power and Wi-Fi for the first sync.
7. Free iCloud storage.
8. Updates on both devices.
9. No VPN or blocking network.
10. Re-register iMessage on the iPhone.
11. Sign out of iMessage on the Mac, then turn Messages in iCloud off and on for the Mac only.
12. Apple Support before deleting anything.

If messages won’t send: System Status, connection, restart and update, date and time, the right address, Text Message Forwarding for green bubbles, then sign out of iMessage and back in.