ADDENDUM to my discussion of integrating PageEdit, seen below: The instructions to 'Configure Sigil to run PageEdit' are WRONG and confusing in a few aspects. There are my personal corrections. {A} Step 2 should read: "Open Sigil, and go to SIGIL > Preferences > General Settings. At the very bottom, you should see a box that says “Set your preferred alternative external xhtml editor.” (If the option is not present, your Sigil version doesn’t support PageEdit.)" IOW, replace "Edit" with "Sigil". {B} In the next step "2", on Mac you're simply choosing the PageEdit app, not an ".exe". {C} The step "3" should read: "Now, ON THE THIRD ROW of Sigil, you’ll see a little button that looks like an X WITH A PENCIL ON TOP that will open up PageEdit." IOW: No, not the top row, the third. And its icon is now an "X". One line of the "X" is blue. The other is a yellow pencil. - - I'm going to get in touch with the dev to have this corrected.