How to Create an Attractive HTML Email Signature For Mail on Mac OS X Sierra 10.12

Mac Mail on osX Sierra 10.12

Apple released Mac OS X Sierra (Version 10.12) on Sep 20th, 2016. The latest version of the Mac operating system has some great new features like the intro of Siri and Universal Clipboard. Mail didn’t change much but getting a HTML email signature installed in Mail on Sierra have changed a little from El Capitan. For instructions on creating and installing an HTML email signature on OS X El Capitan or earlier Mac operating systems, click on link: http://mydesignpad.com/htmlsignature-install-instructions/. Continue reading for instructions on installing an HTML email signature in Mail on OS X Sierra

Before we start, you need the following to set up a HTML email signature in Mail:

  • A Mac computer with Mail running on Mac OS X 10.12.X Sierra.
  • A text editing software to read and edit the HTML codes. I recommend using TextEdit since it is preloaded on Mac computer.
  • A HTML file coded with your desired email signature design. Use MYDESIGNPAD’s HTML email signature design service if you want us to create a great looking signature design for you.
  • A web server for hosting images being used in your design.
  • (We offer free images hosting if you use our HTML email signature design service)

  • Know how to upload the images to your web server and get image links.

STEP 1: Create Placeholder Signature

  • Open Mail.app
  • On the main menu, go to Mail>Preferences…>Signatures

Yosemite Mac Mail Preferences

  • Click the + icon located on the bottom of the 2nd column to add new placeholder signature and give it a name that you like. I am naming my signature: MDP-iMac

Yosemite Macmail Preferences Signature Setup1

STEP 2: Assign Signature to Desired Email Account

  • Drag the placeholder signature into the desired email account on the 1st column

yosemite-macmail-preferences-sig-setup2

  • With the desired email account highlighted on the 1st column, select the placeholder signature from the Choose Signature drop-down menu.

yosemite-macmail-preferences-sig-setup3

STEP 3: Check Settings for Composing

  • Go to Mail>Preferences…>Composing
  • Make sure Rich Text is selected for “Message Format”

yosemite-macmail-preferences-composing

STEP 4: Check Settings for Viewing

  • go to Mail>Preferences…>Viewing
  • Make sure Load remote content in messages is checked

yosemite-macmail-preferences-viewing

STEP 5: Quit Mail.app

Make sure you do this in order for the HTML email signature to work properly.

  • You may press Command+Q to quit or click on Mail>Quit Mail

STEP 6: Copy The HTML Email Signature Code With TextEdit.app

  • Right-click on your finalized HTML email signature file or hold down the control key to reveal pop-up menu. A HTML file will be emailed to you if you use MYDESIGNPAD’s Email Signature Service
  • Click on “Open With” and select TextEdit.app
  • Once the file is open, you will see the HTML code. Select all (Command+A) and Copy (Command+C)
  • If you see your HTML email signature design instead of the HTML code, follow STEP 6B to setup TextEdit.app to display HTML code and come back to STEP 6
  • After you copy all the HTML code, you may close the file by clicking on the red dot on the upper-right hand corner of the window (Command+W)

yosemite-macmail-textedit1

STEP 6B: Set TextEdit.app to Display HTML Files as HTML Code

Skip this step if you were able to see the HTML code in STEP 6.

  • Open TextEdit.app: ~/Applications>TextEdit.app

TextEdit app

  • On the main menu, go to TextEdit>Preferences…>Open and Save
  • Check Display HTML files as HTML code instead of formatted text

yosemite-macmail-textedit-setup

STEP 7: Locate Placeholder Signature

  • Click on your desktop to reveal Finder.
  • On the main menu, go to Finder>Go>Library (press and hold the option key to reveal Library on the drop-down menu)

yosemite-macmail-openlibrary

  • If not using iCloud, go to ~/Library/Mail/V4/MailData/Signatures/
  • If using iCloud Drive, go to ~/Library/Mobile/Documents/com~apple~mail/Data/V4/MailData/Signatures/
  • Turn on List view and click on Date Modified to display the latest files on top
  • The placeholder signature you just created is the file ending with .mailsignature with the most recent modified date

yosemite-macmail-findplaceholdersignature

STEP 8: Open and Update Placeholder Signature

  • Open placeholder signature file with TextEdit.app (hold down the option key and click on file to reveal pop-up menu. Click on “Open With” and select TextEdit)

yosemite-macmail-openplaceholdersignature
yosemite-macmail-openplaceholdersignature2

  • Select and delete everything under the Mime Version… line
  • Press Command+P to paste your HTML email signature code that you have copied earlier into the file. (Your HTML file is emailed to you if you are using our Email Signature Service)

yosemite-macmail-replacesignatureinfo

STEP 9: Lock Updated Signature File

Very important step to follow in order for signature to work.
Skip this step if you are using iCloud.

  • Click on the downward triangle located on the top right of the opened file

yosemite-macmail-replacesignatureinfo2

  • On the pop-up menu, check Locked
  • Quit TextEdit

Lock file

STEP 10: Restart Mail

  • Open Mail back up
  • Click on the Compose new message button to open a new message window
  • Your new HTML email signature should appear automatically
  • If your HTML email signature doesn’t show up, make sure the correct email account is selected on the From drop-down menu below the Subject line
  • Make sure the correct HTML email signature is selected in the Signature drop-down menu as well if you have more than one signature installed

yosemite-macmail-checkemailsignature

Installation Completed

Congratulations! That is it! Hope you got it working as it should. Go on with Mail as usual. Happy email writing. Contact me or leave a note if you have any questions or comments. If you want a creative and visually appealing HTML email signature and would like to have MYDESIGNPAD create one for you, please click on link for more info: http://mydesignpad.com/htmlsignature/

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