Note: Make sure you are using either Google Chrome or Firefox during the installation process.
Create your email signature on NEWOLDSTAMP.com and follow these simple steps to install it into Mac Mail.
After you finish creating your email signature, click Save and Install button under the signature preview.
Or if you have saved your signature priorly, hover over your signature on the Dashboard and click Use button.
Select the Mail icon in the list of email clients.
Scroll down the Signature Preview and Click the “Copy and Proceed” button, which will save the signature code in the clipboard.
Open Mail App on your computer and go to Mail App signature preferences (Mail > Preferences > Signatures)
Choose which account you want to use the signature for and click “+” button to add a new signature and give it a name.
Uncheck the “Always match the default font” box.
Paste the signature into the signature box (CMD + V).
Close the signature settings window regardless of how the signature looks like on the preview as sometimes it may look disrupted.
Compose a new email to see your new email signature in action.