Logo to left of signature in Apple Mail

Hi reichc4075,

Thanks for contacting Apple Support Communities!

We understand that you'd like to add a logo to the left of your signature in Mail.

You can add an image to your signature by dragging the image to the preview area as outlined here: Create and use email signatures in Mail on Mac - Apple Support

"Create signatures

1. In the Mail app  on your Mac, choose Mail > Settings, then click Signatures.
2. In the left column (account list), select the email account where you want to use the signature.

If All Signatures is selected when you create a signature, you need to drag the new signature to the desired email account before you can use it.

3. Click the Add button below the middle column.

4. In the middle column (signature list), type a name for the signature. 

This name appears in the Signature pop-up menu when you write a message.

5. In the right column (the preview), do any of the following to create your signature:

• Edit your text: Click Edit in the menu bar to paste text, turn text into links, and check spelling and grammar.
• Format your text: Click Format in the menu bar to change the font and color, change text alignment, and add lists.
• Add an image: Drag an image into the preview area.

If you want your signature to appear after the original text of messages you reply to or forward, deselect the “Place signature above quoted text” checkbox."

We hope this helps.

Cheers!