What GUI tool can read maildir?

I can use mutt to read maildir on Mac, but is there any graphical tool available?

mutt -f /path/to/maildir

Since mutt can't render HTML emails, I will need something else.

Any ideas?

EDIT for thunderbird

I've changed mail store to maildir format,

And selected a local folder,

The UI become like this, unexpected ..

Solution 1:

Thunderbird can use maildir. https://support.mozilla.org/t5/Basics/Maildir-in-Thunderbird/ta-p/32138. Create a new account in thunderbird. Quit thunderbird. cd to the newly created maildir. rm -rf and then symlink to your existing maildir you used with mutt. Reopen thunderbird.