# How to change the default font in Apple Mail on Mac: Fonts and Colors steps

> Learn how to change the default font in Apple Mail on Mac with Settings, Fonts & Colors, and Rich Text steps, plus Tahoe fixes.

URL: https://www.lazur.app/how-to/change-the-default-font-in-apple-mail
Updated: 2026-11-07

To change the default font in Apple Mail on Mac, open Mail > Settings, click Fonts & Colors, and set Message font. Then set Composing > Message Format to Rich Text, because Plain Text ignores the font you pick.

## Quick answer

- Open Mail > Settings, then click Fonts & Colors.
- Set Message font to the font and size you want for new emails.
- Set Composing > Message Format to Rich Text, or the font will not apply.
- Shift-⌘T switches the current message between Plain Text and Rich Format.
- Received emails keep the font the sender chose, so you cannot set it for them.

Applies to: Apple Mail on Mac, Mail > Settings > Fonts & Colors (Apple guide labeled macOS 27). Time: 5 min. Difficulty: Easy.

## What you need

- Apple Mail on a Mac, with Mail open
- Permission to change Mail settings on your Mac
- Composing set to Rich Text for new messages
- Optional: a second address to receive a test email

## How to Change the default font in Apple Mail on Mac in Apple Mail on a Mac

1. **Open Mail.** Open Mail from the Dock or from the Applications folder. Keep Mail in front, so the menu bar shows Mail's own menus. Tip: If Mail is already running, click its icon in the Dock to bring it forward.
2. **Open Mail settings.** (Mail > Settings) Shortcut: ⌘,. Click Mail in the menu bar, then choose Settings. Older guides and older macOS versions use Preferences instead. Tip: Apple's general list gives ⌘, for settings in the front app. Apple's Mail shortcut list does not include it, so test it first.
3. **Open the Fonts & Colors pane.** (Mail > Settings > Fonts & Colors) In the Settings window, click Fonts & Colors. This pane holds the font options for Mail, including Message font. Tip: The pane also lists Message list font, Fixed-width font, and Color quoted text.
4. **Choose the message font and size.** Find Message font and pick the font and size you want. This sets the font for writing and viewing messages. Close the window when you are done. Tip: If a sender chose their own font, Mail uses that font when you view their message.
5. **Set Message Format to Rich Text.** (Mail > Settings > Composing) Click Composing and set Message Format to Rich Text. Plain Text ignores the font, so this step is needed for the change to show. Tip: Check this setting once before you write.
6. **Start a test email.** Shortcut: ⌘N. Press ⌘N to start a new email. Type one sentence and check that it uses the font and size you picked. Close the draft without sending it if you only wanted to check. Tip: Send the test to a second address to see the message outside your Mac.
7. **Switch one message to Rich Format.** Shortcut: ⇧⌘T. If one message is still in Plain Text, press Shift-⌘T to switch it to Rich Format. Then check the font again. Tip: Use the shortcut for one message. Use Composing > Message Format for every message.
8. **Set fixed-width font for plain text (optional).** (Mail > Settings > Fonts & Colors) Go back to Fonts & Colors and tick Use fixed-width font for plain text messages. Leave it off if plain text does not need even spacing. Tip: The fixed-width font only affects plain text messages.

Apple Mail has no single switch called default font. It has one setting that comes closest. The Message font option in Fonts & Colors sets the font and size you use to write and view messages. Change it once, and your new emails start in that font. Two limits apply. Plain Text ignores the font, and senders control the look of what they send you.

![Person writing an email on a Mac, where the default font in Apple Mail on Mac applies](https://images.lazur.app/content-images/howto/change-the-default-font-in-apple-mail/how-to-change-the-default-font-in-1-b8e0c6.jpg)

## What the Message font setting changes

Apple's Mail guide describes Message font as the font for writing and viewing messages. Those are two jobs. When you write a new email, Mail uses the font and size you picked. When you view a message, Mail uses that font unless the sender chose a font of their own.

That makes the setting a default for your own writing, not a rule for your whole inbox. Some emails will still show other fonts. That is expected, because the sender chose them.

A 2023 thread in [Apple Community](https://discussions.apple.com/thread/255023004) describes the same split. The answers say the setting affects new messages you write. Rich text messages carry the sender's font and size to the reader, so the sender cannot control how the reader sees them.

## Check your menu names before you start

Menu names have changed over time. Apple's current Mail guide says Mail > Settings. A Macworld guide published January 3, 2017 says Mail > Preferences, then Select next to Message font. If your menu says Preferences, follow that name. The pane you need is still called Fonts & Colors.

| Source | Menu path | Notes |
| --- | --- | --- |
| Apple Support Mail guide, labeled for macOS 27 | Mail > Settings > Fonts & Colors | Current wording on Apple's site |
| Macworld guide, published January 3, 2017 | Mail > Preferences > Fonts & Colors | Older wording, with a Select button next to Message font |

_Menu wording in Apple's guide and in an older Macworld guide._

Apple's [Mail guide](https://support.apple.com/guide/mail/edit-text-and-email-signatures-mlhlp1046/mac) is labeled for macOS 27. Its version list shows macOS 27 Golden Gate, then Tahoe 26 and Sequoia 15. Apple does not say which Mail version goes with which macOS release. Trust the menu on your screen over any version number in an article.

> **Your menus may differ:** Your Settings window may look different from these steps if your Mail version is older or newer. Check the names on your screen and match the pane called Fonts & Colors.

## Pick a font and size you will actually read

Choose a font you can read at a glance in a long email. Clear letterforms matter more than fancy shapes. Size matters as much as the typeface. A slightly larger size helps on a small laptop screen, and a smaller size fits more text on a wide monitor.

Message list font is a different option on the same pane. It changes the font in your list of messages, the column with senders and subjects. It does not change the text of the emails you write. Leave it alone unless the list itself is hard to read.

## Plain Text ignores your font

Mail can send messages in Plain Text or Rich Text. Plain Text carries no font information, so your Message font choice does not apply to it. Macworld makes the same point in its [guide to macOS Mail fonts](https://www.macworld.com/article/229369/how-to-change-your-default-font-for-viewing-and-composing-in-macos-mail.html). It says to set Composing > Message Format to Rich Text.

You have two ways to switch. Shift-⌘T flips the current message between Plain Text and Rich Format. Composing > Message Format sets the choice for every message you write. Use the shortcut for one email. Use the setting when you want the change everywhere.

![Person working at a desk on a Mac, reviewing Apple Mail settings before a font change](https://images.lazur.app/content-images/howto/change-the-default-font-in-apple-mail/how-to-change-the-default-font-in-2-10b130.jpg)

## Fixed-width font for plain text messages

Apple's guide lists Fixed-width font as its own option. It applies to plain text messages, and only when you tick Use fixed-width font for plain text messages. Tick it when plain text needs even spacing, such as lined-up columns or short code snippets. Leave it off for everyday email.

Here is a worked example. You email a short list of server names and their status in plain text. In a proportional font, the columns drift out of line. In a fixed-width font, each character takes the same space, so the columns stay straight.

## Test your change before you send

Press ⌘N to start a new email. Type one sentence, then check the font and size in the body. If it matches your setting, you are done. Close the draft without sending it if the test was only a check.

Send a test to a second address you can open on a phone or in another mail app. You will see how the message looks away from your Mac. Rich text carries the sender's font and size, but the reader's app still decides the final look. If the test looks different from your screen, that is the reason.

## Common mistakes that waste time

1. Changing the font while Plain Text is on. The new font does not appear in that message.
2. Expecting every email to change. Received messages keep the sender's font when the sender chose one.
3. Looking for a font picker inside each message. The setting lives in Fonts & Colors in Settings.
4. Assuming iCloud.com matches the Mac app. Community answers from 2020 say iCloud.com has no default font setting.
5. Giving up after one restart. One Tahoe user reported that the fix worked only after several restarts.

## Known problem on macOS Tahoe: bold Helvetica returns

In September 2025, a thread in [Apple Community](https://discussions.apple.com/thread/256139548) reported that Mail on macOS Tahoe 26.0 used a condensed bold Helvetica for new messages. The poster said the font kept reverting for new messages. The thread, posted September 18, 2025, collected nine suggested fixes in its replies.

The fix mentioned most often is removing the Helvetica family in Font Book, then restarting Mail. A reply posted November 4, 2025, on macOS 26.1 says it worked after several restarts. Apple has not confirmed this fix. It comes from users who tried it.

> **Read before you remove a font:** Removing a font family in Font Book affects every app that uses it, not only Mail. Back up your Mac first. If you use Helvetica in other apps, skip this fix and ask Apple Support instead.

## What you cannot control from Mail

You cannot set a default font for your recipients. Their mail app decides how they see the message. A rich text message carries the sender's font and size, but the reader's screen and app still shape the result. Treat the Message font setting as your writing default, not a look you can lock in for everyone.

iCloud.com works differently. Community answers in a [2020 Apple Community thread](https://discussions.apple.com/thread/251478353) say there is no default font setting for iCloud email. Those answers come from members, not Apple staff. Apple has not confirmed that for current iCloud Mail, so check the settings there before you rely on it.

## Keyboard shortcuts that help

Apple lists ⌘, as the general shortcut for opening settings in the front app. Apple's Mail shortcut page does not list a Settings shortcut, so use the menu if ⌘, does nothing. The Mail shortcuts that matter here are ⌘N for a new email and ⇧⌘T for the message format. Apple's Mail shortcut page lists no font shortcut at all.

## Quick reference for Mail font settings

| Setting | Where to find it | What it changes |
| --- | --- | --- |
| Message font | Mail > Settings > Fonts & Colors | Font and size for writing and viewing messages |
| Message list font | Mail > Settings > Fonts & Colors | Font in the list of messages |
| Fixed-width font | Mail > Settings > Fonts & Colors | Plain text, only when the fixed-width box is ticked |
| Message Format | Mail > Settings > Composing | Plain Text or Rich Text, which decides whether the font applies |
| Shift-⌘T | Keyboard shortcut | Switches the current message between Plain Text and Rich Format |

_Font options in Apple Mail on Mac, based on Apple's guide._

## Next steps after you change the font

Once your fonts look right, a signature is usually the next job. See [how to create an email signature in Apple Mail on Mac](https://www.lazur.app/how-to/create-an-email-signature-in-apple-mail) for the steps in macOS 27. Check the font again after you add the signature, so the two match.

## Shortcuts

- Open settings for the front app (Apple's general shortcut): ⌘,
- Start a new email in Mail: ⌘N
- Switch the current message between Plain Text and Rich Format: ⇧⌘T

## If it does not work

- **New emails still use the old font** Check Mail > Settings > Composing. If Message Format is Plain Text, set it to Rich Text, then press ⌘N to start a new email.
- **Received emails do not change to my font** That is expected. When a sender chose a font, Mail uses it to show their message. Your setting does not override it.
- **New messages revert to bold Helvetica on macOS Tahoe** Users report that removing the Helvetica family in Font Book and restarting Mail fixed it. Apple has not confirmed this. Removing a font family affects other apps, so back up first.
- **The menu says Preferences, not Settings** Older guides and versions use Mail > Preferences. The pane is still called Fonts & Colors, so follow the same path under the name you see.
- **Recipients see a different font than I set** Recipients see what the sender sent, and their own mail app shows it. You cannot control that from your Mac.
- **iCloud.com does not follow my Mac setting** Community answers from 2020 say iCloud.com has no default font setting. Check the iCloud Mail settings there, and use Mail on your Mac for your default.

## With Lazur

Lazur is a voice assistant for the Mac that lives in the notch. Hold ⌥ ⌘ and ask; it sees your screen, answers out loud, points at buttons and walks you through apps. Hold fn to dictate. Free for 3 days, then $18/month: https://www.lazur.app/download

- “Where's the Fonts and Colors pane in Mail?”: Lazur draws a circle and a label around Fonts & Colors, and you click it yourself. (Points at it)

## FAQ

### Does the default font change how I see emails people send me?

Not usually. Apple's guide says that when a sender chose a font, Mail uses it when you view the message. Your Message font setting mostly shapes the emails you write.

### Why do my new emails still use the old font?

Check Mail > Settings > Composing. If Message Format is set to Plain Text, the font does not apply. Set it to Rich Text, then press ⌘N to start a new email and check again.

### Is there a keyboard shortcut for Mail settings?

Apple's general list gives ⌘, for opening settings in the front app. Apple's Mail shortcut page does not list one, so test ⌘, in Mail. If it does nothing, use Mail > Settings from the menu bar.

### Can I set a default font for iCloud.com email?

Community answers from 2020 say no. Apple has not confirmed that for current iCloud Mail, so check the iCloud Mail settings before you assume it cannot be changed.

### Why did the bold Helvetica font come back on macOS Tahoe?

A September 2025 Apple Community thread reports the same problem on macOS Tahoe 26.0. The most cited fix is removing the Helvetica family in Font Book and restarting Mail. Apple has not confirmed it, and removing a font family affects other apps too.

### Does the fixed-width font setting change every email?

No. It applies only to plain text messages, and only when you tick Use fixed-width font for plain text messages in Fonts & Colors.

### Will recipients see the default font I set?

Not reliably. Rich text messages carry the sender's font and size, but the reader's mail app and screen decide the final look. The 2023 Apple Community thread makes the same point.

## Sources

1. [Change Fonts & Colors settings in Mail on Mac - Apple Support](https://support.apple.com/guide/mail/change-fonts-colors-settings-cpmlpreffont/mac), Apple, checked 2026-11-07
2. [Edit text and email signatures in Mail on Mac - Apple Support](https://support.apple.com/guide/mail/edit-text-and-email-signatures-mlhlp1046/mac), Apple, checked 2026-11-07
3. [Keyboard shortcuts in Mail on Mac - Apple Support](https://support.apple.com/guide/mail/keyboard-shortcuts-mlhlb94f262b/mac), Apple, checked 2026-11-07
4. [Mac keyboard shortcuts - Apple Support](https://support.apple.com/en-us/102650), Apple, checked 2026-11-07
5. [How to change your default font for viewing and composing in macOS Mail - Macworld](https://www.macworld.com/article/229369/how-to-change-your-default-font-for-viewing-and-composing-in-macos-mail.html), Macworld, checked 2026-11-07
6. [How Do You Set Default Compose Font and Size in Mail - Apple Community](https://discussions.apple.com/thread/255023004), Apple Community, checked 2026-11-07
7. [Unable to change the default font in Mail on macOS Tahoe - Apple Community](https://discussions.apple.com/thread/256139548), Apple Community, checked 2026-11-07
8. [changing the default font in icloud email - Apple Community](https://discussions.apple.com/thread/251478353), Apple Community, checked 2026-11-07