Why are there no images in my signature?
There are 2 things which can prevent images from showing in emails when using Mac Mail:
- Plain text is enabled
- Images are not set to load
Both options can be found in the settings, and we'll walk you through both of them here.
For option 1, Plain text is enabled, open up the Composing settings.
Go to Mail>>Preferences to open the settings.
You can also click ⌘+, (command and comma) from anywhere in the Mail program to open these settings.
Under the Composing setting you will see the option for Message format.
If the dropdown says Plain Text it will mean images will not be able to show. Switch this to Rich Text and images will begin to show again. 
If the Rich Text option was already turned on then we should check that your images are allowed to download.
Open the Privacy options.
You'll see a checkbox option to Block All Remote Content. Make sure this is checked off.
This will make sure all image will be able to be shown in emails.