I gave this a try before buying it and was less than pleased . The Monterey install itself was weird but eventually I figured it out. The corrections Grammarian Pro suggested were interesting but not very colloquial. This is not how many of us speak regardless of our education or background. What bugged me even more were the two icons in the Menu Bar, a check mark and a pencil icon, and the two icons in the Dock which did not hide despite clicking on 'Hide'. Wouldn't just the pencil icon in the Menu Bar suffice? Maybe there is a hidden preference to work around these glitches. And, applying corrections seems to require way too many steps between Next and Correct - without seeing the final product. I may come back and try it again if 'What's New' indicates these shortcomings have been addressed. Other than these things, Grammarian Pro worked well on my M1 iMac.