A considered sign-off.

Add it to Apple Mail

1. Choose Copy signature. If copying is unavailable, select the signature in the white panel and copy it manually.
2. Open Mail → Settings → Signatures. Select your email account and add a new signature.
3. Turn off Always match my default message font, then paste the signature.
4. Choose it as your account’s signature and check it in a new draft.

If the logo is missing after pasting, insert the downloaded PNG in the signature editor. Some recipients may choose not to load images; your contact details remain readable text.