Apple Mail AI in 2026: Built-In Features and 5 Add-On Tools

Yes, Apple Mail has AI built in. On macOS 27 Golden Gate, Apple Intelligence summarizes emails and whole threads, suggests replies, pins urgent mail to the top with Priority Messages, offers one-click actions and finds messages by meaning. You need a Mac with M1 or later, a supported language, and a region where Apple offers it.

That covers a lot of the daily inbox, and it costs nothing extra. It also leaves gaps: nothing on an Intel Mac, no AI in languages Apple hasn't added, and no assistant that knows your calendar and your people. Below is every Apple Intelligence feature in Mail on the Mac, how to use and switch off each one, where Apple's pages say it isn't available, and the add-on tools that work alongside Mail when you want more.

What AI features does Apple Mail have on the Mac?

Apple Mail on macOS 27 has six AI features: automatic summaries in the inbox, a Summarize button for any email or thread, Smart Reply, Priority Messages, Suggestions for quick actions, and search that understands what you mean. Writing Tools, which work in any Mac app, add proofreading and rewriting to the compose window. Apple lists them on its Apple Intelligence feature page and in the Mail User Guide.

Categories (Primary, Transactions, Updates and Promotions) sort the inbox too. Apple documents them in its sorting guide without calling them an Apple Intelligence feature, and says they aren't available in every country or region.

Which Macs, languages and regions get Apple Intelligence in Mail?

Apple Intelligence in Mail needs a Mac with M1 or later (or the MacBook Neo), macOS 27, and the device and Siri language set to the same supported language. It isn't available on Intel Macs, and it doesn't work on Macs bought in mainland China, according to Apple's getting-started page published October 22, 2026.

• Languages: English, Chinese (Simplified), Chinese (Traditional), Danish, Dutch, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish and Vietnamese, per the footnote in Apple's Mail guide.
• Suggestions in Mail: English only, as both the macOS 27 page and Apple's feature list say.
• Storage: up to 8 GB on most Macs, and up to 14 GB on Macs with M3 or later and at least 12 GB of memory (Apple).
• Mainland China: not available on devices bought there, or on devices bought elsewhere when you are in mainland China and your Apple Account region is set there (Apple).
• Usage limits: features that run on Apple's servers have daily limits, and Apple says expanded access will cost a fee in the future (Apple).

You don't have to switch anything on. Apple says the new Apple Intelligence features become available automatically when you update an eligible Mac to macOS 27. If the Summarize button never shows up on a supported Mac, check the language settings first: the Mac's language and Siri's language have to match.

How to summarize an email in Apple Mail on a Mac

To summarize an email in Apple Mail, open it, scroll to the top and click Summarize. A summary appears above the message, and if the email is part of a thread, Mail summarizes the whole thread. The steps come from Apple's Mail guide.

1. Open Mail and select the email.
2. Scroll up to the start of the message.
3. Click Summarize.
4. Read the summary above the email, then open the parts you need in full.

Inbox summaries work differently: a short summary appears on its own under each unread email. To swap them for the first lines of the latest message, choose Mail > Settings > Viewing and deselect Summarize Message Previews.

I leave inbox summaries on for newsletters and shipping notices, and I still open anything from a client in full. Apple's own guide warns that outputs vary and important information should be checked, and a two-line summary can easily drop the one condition in a contract email that changes the answer.

How to use Smart Reply in Apple Mail

Smart Reply in Apple Mail suggests replies to an email you received, and Apple Intelligence drafts the one you pick. Click in the Message field of your reply, choose a suggestion, then edit before you send (Apple).

1. Open the email and click Reply.
2. Click in the Message field.
3. Choose one of the suggested replies.
4. Read the draft Apple Intelligence writes, change what needs changing, and click Send.

Smart Reply can also be personalized. Apple lists "Personalized Smart Reply in Mail" for the Mac in its feature list, and the Mail guide's what's new page describes writing and replying "in a way that's personalized to you and your relationships." To turn that off, choose Mail > Settings, click Composing and deselect Personalize Smart Replies (Apple).

Smart Reply is at its best on the yes-or-no email: a meeting time, a confirmation, a quick thanks. For anything where the tone matters, treat the draft as a starting point and rewrite the first line yourself. That first line is what the other person reads in their preview.

How to turn on Priority Messages and categories in Mail

Priority Messages puts time-sensitive emails, like a same-day invitation or a boarding pass, at the top of your Apple Mail inbox. In Apple's Mac guide, you turn it on from the View menu in the inbox; the macOS 27 search guide describes the same view.

1. Open Mail and click your inbox.
2. Choose View in the menu bar.
3. Click Show Priority Messages.

Categories sort the rest. Primary holds personal and time-sensitive mail, Transactions holds receipts and shipping notices, Updates holds news and newsletters, and Promotions holds sales email. When a sender lands in the wrong place, Control-click one of their messages, choose Categorize Sender and pick a category; Apple says current and future mail from that sender moves with it (Apple).

When I come back from a long weekend, Priority Messages is the first thing I look at. I answer what's pinned, then work through Primary, and leave Promotions for whenever I have a spare ten minutes.

What's new in Apple Mail AI on macOS 27

macOS 27 adds three things to Mail: Suggestions that turn an email into a one-click action, search that ranks results by relevance and meaning, and writing help from Siri AI that can match your style. Apple describes them on its macOS 27 page and in the Mail guide's what's new page.

Suggestions

Suggestions offer quick actions based on the conversation, such as adding a calendar event or searching for a photo, and you click a suggestion to accept it (Apple). Apple's what's new page also mentions managing reservations, getting directions and sending emails. Suggestions in Mail are available in English only.

Search by meaning

Mail search now looks for results based on what you mean, not just the words you type. Apple's example is a search for "NYC business trip" bringing up itineraries, travel details and event locations. Top Results come first, ranked by messages you've read and replied to recently, your VIPs and contacts, and other factors (Apple).

Write with Siri

Siri AI, in beta on macOS 27, can draft text from scratch or give feedback on what you've written, and in Messages and Mail it can match your writing style, punctuation and tone (Apple). It starts in English, French, Japanese, Korean, Portuguese and Spanish. Siri AI is Apple's new beta Siri, separate from the Mail features above. Apple says it won't launch in the EU at first on iPhone, iPad and Apple Watch, and hasn't said the same for the Mac, and Siri AI isn't available to anyone under 13.

How to use Writing Tools and ChatGPT in Apple Mail

Writing Tools work in the Apple Mail compose window like in any other Mac app: select your text, Control-click it, choose Writing Tools, then Show Writing Tools. From there you can proofread, rewrite in a Friendly, Professional or Concise tone, describe the change you want, or pull out a summary or key points (Apple).

I was halfway through a reply to a supplier once when I noticed it read far colder than I meant. Rewrite with the Friendly tone gave me a version I could edit in a minute, which beat starting over. Proofread is the one I use most, though, right before anything goes to a client.

To have ChatGPT write a draft, Control-click the message body, choose Show Writing Tools, then click Compose and describe what you want. Compose needs the ChatGPT extension, which you set up once:

1. Open System Settings and click Siri in the sidebar.
2. Click ChatGPT, then click Set Up, and follow the onscreen steps. With Siri AI (Beta), click Set Up Extensions, click ChatGPT and turn on Use Extension.
3. Choose whether to sign in with a ChatGPT account. You can use it without one; sign in only if you want requests saved in your ChatGPT history.

Those steps come from Apple's ChatGPT guide. The extension works only where the ChatGPT app and service are offered.

Is Apple Intelligence in Mail private?

Apple says many Apple Intelligence tasks run entirely on your Mac, and harder requests go to Private Cloud Compute, where the data is processed only to fulfill the request and isn't stored or made accessible to Apple (Apple). Apple also notes Private Cloud Compute isn't available in every region.

ChatGPT is a separate step, and you choose what to send. When you use the extension, Apple says your request and attachments go to ChatGPT along with limited details such as time zone, country, device type and language; your IP address is hidden, but your general location is shared. Without an account, OpenAI can't link the data to your Apple Account and must not use it to train its models; signed in, your ChatGPT account settings and OpenAI's privacy policies apply (Apple).

Where Apple Mail's built-in AI stops

Apple's AI in Mail works on the email in front of you. It summarizes, suggests a reply and sorts, but Apple's Mail guide doesn't describe it planning a reply around your calendar, chasing someone who hasn't replied, or remembering what you promised a client last month. It also does nothing on an Intel Mac or in a language Apple hasn't added.

That's where add-on tools come in. They connect to Apple Mail in three different ways, and the way matters more than the feature list:

• A Mail extension runs inside Mail. Apple lets you turn these on under Mail > Settings > Extensions, and they show up as icons in the viewer or compose window toolbar (Apple).
• A Mac-wide app works on whatever text you select in any app, Mail included, usually through macOS Accessibility permission.
• A server-side service works on your mail account itself, so its effect shows up in Mail, on your iPhone and on the web alike.

5 AI add-on tools that work with Apple Mail

These five tools work alongside Apple Mail rather than replacing it. Every price for the other four links to the vendor's pricing or help page and is in US dollars. If you'd rather change apps entirely, our Gmail vs. Apple Mail comparison weighs the two biggest options, and the Spark alternatives page covers other Mac mail apps.

1. Mailbutler: an AI sidebar inside Apple Mail

Mailbutler adds a sidebar to Apple Mail with a Smart Assistant that drafts emails from a few keywords, responds, summarizes, finds to-dos and fixes spelling and grammar, with controls for length, tone and language (Mailbutler). You install it from the Mac App Store and register in the sidebar inside Mail (setup guide).

The AI features sit in the Smart and Business plans only. Smart costs $14 a month for each user, or $11 on yearly billing, and you can try every feature free for 14 days first (Mailbutler pricing). Mailbutler makes sense if you want the AI in a panel next to the message, without leaving Mail. If you only want summaries and quick replies, Apple already does those for free.

2. Grammarly: writing help as you type

Grammarly's Mac app works in Apple Mail, Outlook, Gmail and most other email clients, and its generative AI can draft replies as well as correct them (Grammarly for Mac). The free plan includes 100 AI prompts a month and Pro includes 2,000 per member (plans). Pro costs $144 a year, which works out to $12 a month (Grammarly).

Grammarly earns its place over Writing Tools when you want suggestions while you type rather than after you select text, or when your Mac can't run Apple Intelligence at all. Its Mac page says it needs macOS 10.15 or newer, so it also covers Intel Macs.

3. Raycast: AI commands on any selected text

Raycast is a Mac launcher whose AI Commands work on the selection or focused field in the active app, so you can select a paragraph in a Mail draft and run Improve Writing, Fix Spelling and Grammar or a tone change (Raycast manual). Quick Fix runs the spelling and grammar fix in place with a double press of the right Shift key, after you grant Accessibility permission.

AI Commands are a Pro feature. Pro is $10 a month or $96 a year with 500 AI credits a month, and Raycast AI isn't part of Free (Raycast pricing). Raycast suits people who already live on the keyboard; for everyone else, the Control-click route to Writing Tools does most of the same job.

4. SaneBox: sorting that works on every device

SaneBox sorts mail on your mail server rather than in an app. It identifies less important email from headers such as the sender and subject, then tells your server to move it to a folder called @SaneLater, which you can open from any device or client (SaneBox). In Apple Mail, the folder appears under your account in the Mailboxes list (SaneBox).

SaneBox's own help pages call this smart sorting, not AI, but it does the job Priority Messages and categories do, and it works the same on an Intel Mac or a phone. Plans are Snack (one account), Lunch (two) and Dinner (up to four), with a 7-day free trial (plans), and they start at $7 a month (SaneBox). It needs an IMAP account, so the folders won't appear on a POP account.

5. Merlin: an assistant over Mail that knows your day

Merlin is our own Mac app, so weigh this one accordingly. Press ⌥Space while Apple Mail is in front and Merlin opens over it, already aware of the app you're in and any text you've highlighted. Select a client's question and ask for a reply, then copy it into your draft. Select text in a draft you're writing and ask for a rewrite, and Insert in Mail pastes it straight back. If the account in Apple Mail is Gmail, connect it to Merlin too: it can then read the thread, check your Google Calendar, and prepare the reply as a card; nothing goes out until you've edited it and said yes.

When I'm answering a scheduling email in Apple Mail, I select the question, press ⌥Space and ask Merlin for times I'm actually free. Smart Reply would give me a polite yes; it doesn't know that Thursday afternoon is already gone. You can start on the free tier, which renews its credits every month.

Which AI setup should you use with Apple Mail?

Start with what's built in, then add one tool for the gap you actually feel. Stacking three AI tools on one inbox mostly gives you three different drafts of the same email.

• You have an M1 Mac or later and write in a supported language: use Apple Intelligence first. Summaries, Smart Reply, Priority Messages and Writing Tools are free and already there.
• You're on an Intel Mac: Grammarly for writing help and SaneBox for sorting both work without Apple Intelligence.
• You want AI inside Mail itself, in a sidebar: Mailbutler's Smart plan.
• You want faster rewrites without the mouse: Raycast Pro.
• You want replies that know your calendar and your people: Merlin, with Gmail connected.

Why isn't Apple Intelligence working in Mail?

Apple Intelligence usually doesn't appear in Mail because the Mac, the language or the region isn't supported, or a Mail setting is switched off. Check these in order:

1. Your Mac: Apple menu > About This Mac should show an M1 chip or later. Intel Macs don't get Apple Intelligence.
2. Your macOS: update to macOS 27 for the features in this guide (Apple).
3. Your languages: the Mac's language and Siri's language must be the same supported language (Apple).
4. Your region: mainland China isn't supported, and Suggestions are English only.
5. Mail's settings: check Summarize Message Previews under Mail > Settings > Viewing.
6. Daily limits: server-side features can hit a daily limit, which Apple says varies by feature and demand (Apple).

For add-ons, a missing toolbar icon usually means the extension is switched off. Choose Mail > Settings > Extensions, select its checkbox, and customize the toolbar if the icon still isn't there (Apple). Missing SaneBox folders often appear after Mailbox > Synchronize (SaneBox).