I would like to get (for free or for pay) a bencher in Hebrew and English, similar to Artscroll, one side Hebrew and one side English in pdf format that I can open on a Mac or a PC and do some changes. Any leads will be appreciated.
Sefaria provides a free Hebrew and English text of benching here, following the most common Ashkenazic custom. It's not formatted for printing, but it can be copied and pasted into a custom document.
Chabad has a formatted Hebrew/English bencher PDF here, following the Chabad custom. As a PDF, it's not readily editable.1
1. Hat-tip to Salmononius2 for providing this link in a comment.