How to Add Email Signature in Apple Mail

Set up your signature on Mac, iPhone, and iPad

💻Apple Mail on Mac

Open the Mail app, then go to Mail → Settings (or press ⌘ ,).

Click the Signatures tab.

Select an email account on the left, then click the + button to create a new signature.

For rich HTML signatures, you'll need to follow these special steps:

a. Create a basic signature first and close Mail settings.

b. Open Finder and go to: ~/Library/Mail/V10/MailData/Signatures/

c. Find your signature file (ends in .mailsignature) and open it with TextEdit.

d. Replace the content after the headers with your HTML signature.

e. Save the file, then lock it (Get Info → check "Locked") to prevent Mail from overwriting it.

Easier method: Paste your signature into a draft email in Safari/Chrome, then copy and paste from there into Mail's signature editor.

Drag your signature to the email account you want to use it with, then select it in the "Choose Signature" dropdown.

Go to Settings → Mail.

Scroll down and tap Signature.

Toggle "Per Account" if you want different signatures for each email account.

Type or paste your signature text.

Note: iOS Mail has limited HTML support. For rich signatures, set up on Mac and sync via iCloud, or use a plain text version for mobile.

✓Use iCloud to sync signatures between your Mac, iPhone, and iPad
✓Uncheck "Always match my default message font" to preserve your signature's formatting
✓For the best HTML signature experience on Mac, use the file editing method
✓You can assign different signatures to different email accounts