Apple Mail Not Updating on Mac? 11 Fixes for macOS 27 (2026)

When Apple Mail stops updating on a Mac, either an account has gone offline or can't connect, or the new mail did arrive and something in the view is hiding it. Press Shift-Command-N to get new mail, click any lightning bolt or warning icon beside an inbox, then check View > Show Mail Categories and the message filter before changing anything else.

A frozen inbox is unsettling in a particular way: the Mac looks fine, nothing says error, and yet the reply you're waiting for is already sitting on your phone. The fixes below run from the ten-second checks to the slow ones, for the Mail app on a Mac running macOS 27 Golden Gate, the current release, or one of the versions before it.

First, is Mail stuck or is the mail hidden?

Apple Mail has two very different failures that look identical in the inbox. In one, Mail can't reach the server, so nothing new comes down. In the other, Mail downloaded everything and a category, filter or sort order is keeping it out of sight. Telling them apart takes under a minute.

Apple's own checklist for when you can't receive emails starts the same way: click Get Mail in the toolbar first, and only treat it as a receiving problem if nothing turns up.

Apple Mail not updating: 11 fixes in order

1. Get new mail and read the status icon

Force a check with Shift-Command-N, Apple's keyboard shortcut for getting new email, or click the Get Mail button in the toolbar. Then look at the sidebar. A warning symbol or lightning bolt next to an account's inbox, or in the upper-right corner of the window, means Mail has a status message for that account; click it to read it, as Apple's send-and-receive article describes.

The message usually names the cause. "Offline" or "can't reach the server" points at the network or a VPN. A failed login means the provider rejected your password or wants you to sign in again, and Apple suggests confirming the account setup with your provider and checking whether they have an outage.

2. Take the account back online

An offline account in Apple Mail can't get or send messages at all. Apple shows it with a lightning bolt beside the account's mailboxes and another where the Favorites bar ends, and its online and offline guide gives two ways back:

1. To reconnect everything, choose Mailbox > Take All Accounts Online.
2. To reconnect one account, choose Mailbox > Online Status > Take [account] Online.

While an account is offline you can still write messages; anything you send waits in the Outbox until it reconnects (Apple). I once worked through half of this list before noticing the little lightning bolt beside my work inbox, left over from a flight where I'd taken everything offline on purpose.

3. Turn off categories and the message filter

Apple Mail on the Mac can sort the inbox into four categories, Primary, Transactions, Updates and Promotions, and a new email filed under anything other than the one you're viewing looks like it never arrived. Apple's article on messages you can't see says categories came with macOS Sequoia 15.4 and later, and that time-sensitive messages from the other three also appear in Primary.

• See everything once: click the category you're in, above the message list, to show all mail, or double-click another category to open All Mail (Apple's categories guide).
• Switch categories off: choose View and clear Show Mail Categories, or click the View Options button in the toolbar and deselect it there.
• Fix one sender: Control-click their message, choose Categorize Sender and pick a category. Their past and future messages follow.
• Turn off the filter: choose View > Filter > Disable Message Filter, press Command-L, or click the Filter button in the toolbar. A filter you switched on yesterday is easy to forget, and it keeps hiding anything that doesn't match.
• Sort by date: sort the message list by Date so the newest mail sits where you expect it, which Apple lists among its receiving checks.

This is the fix that solves it for me most often. The first week categories were on, I was sure a client's reply hadn't come in, and it was sitting in Updates because it came from a billing system rather than a person.

4. Check Junk, blocked senders and rules

When one person's email never shows up but everyone else's does, Apple Mail is often moving it somewhere on purpose. Apple's missing-messages article lists three places to look:

• Junk: select Junk in the sidebar. If the email is there, move it to the inbox or mark it as not junk so Mail learns.
• Blocked senders: mail from a blocked address may be going straight to Trash, so check there too.
• Rules: open Mail > Settings > Rules and look for one that moves, deletes or marks messages as read. Edit or disable anything you don't recognize.

Rules deserve a slow read. A rule that files newsletters into a folder can quietly catch a real person if it matches on a word in the subject line.

5. Make sure the account is enabled and visible

A disabled account disappears from Apple Mail's inbox without any warning. Choose Mail > Settings, click Accounts, select the account and make sure Enable this account is checked, per Apple's account guide.

If the account is enabled but you still can't see its inbox, the sidebar may be hidden or a section collapsed. Press Control-Command-S to show the sidebar, then hover over each section name and click its arrow to expand it (Apple).

6. Run Connection Doctor

Connection Doctor is Apple Mail's built-in test of your internet connection and every account's mail servers. Apple's Connection Doctor guide explains how to use it:

1. In Mail, choose Window > Connection Doctor.
2. Read the status for each account. If the Mac is online and an account still fails, follow the instructions in the Details column; double-click that text to jump to the account's settings.
3. To watch what happens while Mail contacts the server, open Show Detail and press Check Again.
4. After any change, click Check Again to see whether it worked.

Apple's receiving checklist says Connection Doctor can reveal three causes: a login problem with the account, a problem with the incoming mail server, or firewall software blocking traffic. If Apple Support asks you to turn on Log Connection Activity, know that the logs can contain email content; turn logging off and delete the logs once you've shared them.

7. Watch the Activity window for a stuck download

One large message can hold up everything behind it. Apple suggests checking whether Mail is busy retrieving a big email or attachment (Apple), and the Activity window shows exactly that:

1. Choose Window > Activity, or press Control-Command-0.
2. Look for a download that isn't moving, then wait for it or cancel it.
3. Check the bottom of the sidebar too. Mail shows downloads there, including a large download it has paused to save energy while the Mac is on battery, with a button to resume it (Apple's activity guide).

That battery pause caught me out on a long train ride with the laptop unplugged. Nothing new appeared for most of the journey, and the only clue was a small resume button at the foot of the sidebar.

8. Check how often Mail looks for new messages

Apple Mail checks for new email on a schedule you set in Mail > Settings > General, under Check for new messages. The default is Automatically, and Apple's General settings page says that the frequency then varies depending on whether your Mac is plugged in.

If the menu says Manually, Mail only checks when you click Get Mail, which explains an inbox that never moves on its own. Pick a timed option or Automatically instead. Apple also notes that clicking an IMAP or Exchange mailbox in the sidebar syncs it with the server, so clicking the inbox itself is a quick nudge.

9. Rule out the network and the provider

If Connection Doctor can't reach a server, test the account away from Apple Mail before you change Mail's settings. Apple's troubleshooting article suggests these checks:

• Load a website in Safari to confirm the Mac is online at all.
• Turn off your VPN or any software that filters network traffic. Apple names VPNs as a cause of "offline" errors, and its receiving checklist adds firewalls in routers or set up by your provider.
• Open webmail in a browser: icloud.com/mail, gmail.com or outlook.com. New mail there but not in Mail means the problem is on this Mac. No new mail there either means it's the account or the provider.
• Check the provider's status page. For iCloud Mail, that's Apple's System Status page.
• Look for new terms. Some providers pause service until you accept updated terms, so sign in on their website and look for a notice.

The webmail test is the one I never skip. It takes a minute and decides whether the next half hour goes into Mail's settings or into waiting out someone else's outage.

10. Check the mailbox isn't full

A mail account that has run out of space stops taking new email, and Apple Mail shows you how full it is. Control-click the account's mailbox in the sidebar and choose Get Account Info to see its storage use (Apple). If it's at the limit:

• Delete what you don't need, then choose Mailbox > Erase Deleted Items to empty the Trash.
• Move older messages to a mailbox under On My Mac, which lives on your Mac instead of the server.
• If photos, calendars or notes share the same storage, as they can with iCloud, clearing some of those frees room for mail too.
• Or buy more storage from your provider.

Your Mac needs room as well, since Mail stores downloaded messages locally. On macOS Ventura 13 and later, check it in Apple menu > System Settings > General > Storage (Apple).

11. Rebuild the mailbox

Rebuilding refreshes the list of messages an Apple Mail mailbox holds, and Apple recommends it when messages look missing or garbled, or a search misses mail you know is there. Select the mailbox in the sidebar and choose Mailbox > Rebuild, per Apple's rebuild guide.

For IMAP and Exchange accounts, which covers iCloud, Gmail and most work email, the same page says Mail removes its local copies of the messages and attachments and downloads them again, so the mailbox looks empty until it finishes. On a large inbox, start it when you can leave the Mac alone for a while, and on power.

Still not updating? Three bigger steps

If the eleven fixes above didn't bring new mail in, the remaining causes are an outdated system, a misbehaving add-on, or an account setup that's gone stale. Try them in this order, because the last one is the slowest.

Update macOS

Apple lists updating macOS among the fixes for missing mail (Apple). Choose Apple menu > System Settings, click General, then Software Update, and install what's offered, following Apple's update steps. Keep the Mac awake and the lid open until it finishes.

Turn off Mail extensions

Mail extensions from other apps run inside Apple Mail, so one that misbehaves is worth ruling out. Choose Mail > Settings, click Extensions and clear each checkbox; Apple says the change takes effect immediately (Apple's extensions guide). If mail starts arriving, turn them back on one at a time to find the culprit.

Remove the account and add it back

Removing an Apple Mail account and adding it again resets every setting for it, and it's Apple's final step in its troubleshooting article.

1. Move anything you need from that account's local mailboxes into a mailbox under On My Mac. Removing an account deletes its messages from the Mac, though copies stay on the mail server.
2. Choose Mail > Settings, click Accounts, select the account and click the Remove button.
3. If other apps use the account, open Apple menu > System Settings > Internet Accounts, select it and turn Mail off.
4. Choose Mail > Add Account, enter your address or pick your provider from the list, and sign in.

Those steps come from Apple's account guide. Expect the account to take a while to download again afterward.

Why Apple Mail updates on iPhone but not on Mac

When the same account updates on your iPhone and in webmail but not in Apple Mail on the Mac, the account and the provider are fine; the problem is this Mac's copy of the account. That rules out outages and full mailboxes, and points at fixes 2, 5, 6, 8 and 11.

• Gmail: Google says Gmail no longer works with apps that sign in with just a username and password, and asks you to use Sign in with Google instead. IMAP is always on in Gmail now, so there's no setting to switch on (Google's help page). If the Mac copy started failing after a password change, remove the account and add it back by choosing Google.
• iCloud Mail: Apple's iCloud Mail article says to open Mail > Settings > Accounts, select your iCloud account and confirm it's enabled and its status is online. It also suggests turning off any VPN, checking your iCloud storage and restarting the Mac.
• Work email on Microsoft 365 or Google Workspace: your company's IT team manages the account and its settings, so ask them before removing it from Mail.

Apple Mail shortcuts for a stuck inbox

Four Apple Mail shortcuts cover most of this troubleshooting, all from Apple's shortcut list:

How to keep Apple Mail updating

• Leave Check for new messages on Automatically unless you have a reason to batch your email.
• After changing an email password anywhere, open Mail on the Mac the same day and sign in again if it asks.
• When you take accounts offline for a flight, take them back online when you land.
• Keep an eye on the inbox you're viewing: the category buttons and the Filter button tell you when you're looking at part of it.
• Give each account some headroom on storage, since a full mailbox fails quietly.

Sending trouble is a related but separate problem; our guide to an email stuck as queued covers that, and Apple Mail not sending on Mac covers the outgoing side of Mail. If Mail keeps letting you down and you're weighing a switch, Gmail vs. Apple Mail lays out the trade-offs.