How to install your HTML email signature in Apple Mail macOS High Sierra
Install your HTML email signature in no time! Use our signature installer or follow our step-by-step guides to install your email signature in Apple Mail for macOS High Sierra.
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Before you start
Before you start:
- Ensure you've selected the correct installation guide for your macOS.
- Make sure you have your html email signature file or email signature key accessible.
- Open Apple Mail.
Which installation option should I choose?
Signature Installer App for macOS
If you have a unique signature key then you will want to install your email signature via our installer app. The installation is simple and means you won't have to manually install the signature yourself.
The bonus of using the signature installer app is that it features auto-update functionality and will automatically update your signature in your email client whenever changes are made to it via Email Signature Rescue, preventing the need to re-install.
*Please note that our Signature Installer App is still in beta so we are working on improving it. If you experience any issues, please provide us with detailed feedback via this form.
If you have a html signature file then you can follow the Basic Guide (Copy & Paste).
The Basic Guide is a simple installation which requires opening your email signature in your web browser (excluding Safari), and pasting it into your Apple Mail email client.
If you run into any issues during your HTML email signature installation in Apple Mail on macOS High Sierra, please see the Troubleshooting FAQ before contacting support through your member account.
Install: Signature Installer App
Installing your email signature via the app
Install your email signature once, then never worry again. Our signature installer app for macOS features auto-update functionality which syncs your email signature with our software, allowing it to automatically update when changes are made from your Email Signature Rescue account.
Open the Email Signature Rescue Installer app and click the ( + ) button to add a new signature.
Select your Apple Mail email client.
Select the email account you want to install your email signature into.
Paste your email signature key. If you have HTML file instead of a key, click Use File, then click and select your saved HTML email signature file.
Select to insert for replies/forwards if you would like, then click Install Signature.
The app will install your email signature into Apple Mail for you, and automatically update it if changes are made to it by the Email Signature Rescue account holder.
Installer app not working?
You can report an issue with our macOS Installer App here or via the app.
Install: Basic Guide (Copy & Paste)
Watch the Video Guide
Rather watch how to install your email signature? Check out the video below for full step-by-step instructions on how to install your email signature in Apple Mail for macOS High Sierra.
Follow the Step-by-Step Guide
Open your email signature in Google Chrome or Mozilla Firefox.
If you're logged into your Email Signature Rescue account then you can view your email signature in Full Screen Preview.
Use only the Google Chrome or Mozilla Firefox web browser. Do not use the Safari web browser to copy your email signature from as there is a bug in Safari that will cause your images to stack vertically.
Now that your email signature is open in a new window, press Command + A to highlight the signature, then press Command + C to copy the signature.
Do not use your mouse to highlight your signature, use the key command. Using your mouse may result in you missing out on some code which will cause issues with formatting.
Open Apple Mail and create a new signature by selecting Mail > Preferences...
Click on the Signatures tab at the top of the window. You should then see your email accounts in the left hand side. Select the email account that you would like your email signature to be associated with and then press the + icon at the bottom to create a new signature.
Give your signature a name and make sure the "Always match my default message font" checkbox is NOT checked. Click into the signature text box and delete all of the contents, then press Command + V to paste your email signature in.
The signature won't display the images in the signature preview window which is completely normal, as it will look fine when we send the email. Test that it has been installed correctly by composing a new email instead.
Close your Preferences and compose a new email. You should see that your signature is automatically inserted.
If you find that your signature isn't automatically inserting, you will need to go back into your Preferences and set it as your default email signature.
Congratulations! Your email signature is now installed and ready to use!
If you're experiencing any issues installing your email signature within Apple Mail, you'll likely be able to find a resolution here.
I'm experiencing issues with the ESR Signature Installer App
Although we've thoroughly tested it, the ESR Signature Installer App is still in BETA so it is possible that you may experience some issues. If you do come across any issues when using the app, please get in touch with our friendly support team.
My signature is displaying in Plain Text
There can be two causes to this, the likely one is a bug which is in Apple Mail (High Sierra OS). When you insert your signature, you will see a check box below that says Always match default message font, make sure this is unticked, if it is unticked, tick it, untick it, then re-insert your email signature.
The second is your preferences are set to compose in Plain Text and not HTML. Make sure that in Mail > Preferences > Composing, you are not set to send in “Plain Text”, but in “Rich Text” instead.
My images are stacking on top of one another
This issue occurs when you copy your signature from Safari due to a bug in their software. As stated above in the guide, make sure you're copying your signature from Google Chrome or Mozilla Firefox to avoid this.
My signature isn't inserting when I compose an email
This can be due to one of two things. The first thing to check is that you selected your signature as your default. If that is correctly selected you need to make sure your signature is attached to your account. In your preferences window make sure your signature is visible when you click on your account and isn't only in All Signatures.
Still experiencing issues?
If you're a member of Email Signature Rescue, you can submit a ticket to our friendly support team through your member account using the red help button. If you're not a member and need help creating or installing your HTML email signature, consider joining Email Signature Rescue for assistance.
Troubleshooting: Where do I find my email signature key?
- If you are an Email Signature Rescue member and are logged into your account, you can find your key on your dashboard.
- If you have been emailed your signature key, go to the email and you'll find your 12 character key there.
- If your email signature is managed by an account administrator or reseller, please get in touch with them and have them supply you with your signature key.
Troubleshooting: Where do I find my email signature HTML file?
- If you are an Email Signature Rescue member and are logged into your account, you can download your HTML file from your dashboard or view it by selecting Full Screen Preview.
- If you have been emailed your signature file, open the email and you'll find it attached.
- If your email signature is managed by an account administrator or reseller, please get in touch with them and have them supply you with your signature file.