WiseStamp is the right choice to generate Apple Mail Signatures (please note that Apple Mail is often referred to as Mac Mail). Just use the Mac export tool to copy and paste your signature into the Mac Mail settings. Be sure to use a Chrome browser for this process.
- Go to Settings >> Add to your email
- In the pop-up that appears select the Mac Mail option and follow the on-sreen directions.
You can watch the video below for a full tutorial on how to properly export your signature.