Apple Mail search function not working

Hi there, sonicmuse99!

Thanks for reaching out to the Apple Support Communities! It sounds like you have an issue with searching within the Mail app on your Mac. First, check out this article If searching doesn’t find the right emails in Mail on Mac. This article will give you steps you can take for issues searching in the Mail app.

We also suggest checking out this article to Rebuild the Spotlight index on your Mac and see if that resolves the issue for you.

Let us know the results and have a great day!