I can't believe that no-one has done this already but as far as I can see, we Mac users have to use the command-line when using our TL866 programmers.
That's absolutely fine; the man page exists, is short and easy to understand. Purely to save myself from trying to remember what options I need to use, or last used*, I've built GUMP (Graphic User-interface for MiniPro) which is just a wrapper for the minipro command**
I'm throwing this out there so that if anyone else is interested in having this, I'll tidy it up a bit and make it publicly available. (Comment below or contact me using the usual channels.)
* or having to type the string somewhere and then trying to remember where I saved it
** which you need to install separately. However, if you already have homebrew, this is as simple as:
brew install minipro