Here' s posts by Mixey below, he is the author. It seems it is designed for Windows, Anyrail too, but I think you should read this paying note to Moonmans posts in particular, later a post by Mixey about the WINE program. You may be able to use it after all, maybe. Make your needs known by posting a Mac request too.
In the meantime, if I had some solid dimensions on table size, MTH track dimensions, track you have, wall clearances, max kick-out and overhangs, loco & car lengths, etc. All listed in one place, or close to it. I wouldn't mind helping by "virtual building" and posting for you. It may not be speedy, or exact, because it wont be MTH, but I think we could get it close. Image files, real, or from programs, could be used by you, with "paint"(sorry Im mac illiterate), or similar program, to convey your ideas back to me. I think with some searching you will find a free mac program, but I cant suggest one over another, and I might not be able to run it on a windows/ibm format to help, but its worth a shot. https://ogrforum.com/t...ello-from-the-author
As/if we go on, remember, I don't own plastic type track, nor do I do a lot of switching, or point to point. I'm a postwar Lionel looper, 40+ in conventional, Grandson of a truly serious collector. Some knowledge rubbed off. I don't consider myself an expert at anything, but like it proved when Im wrong(stubborn). I have played with MTH, TMCC, DCC, Digitrax, and more but never owned digital controls. No cab locos, and only a few diesel switchers I seldom run. A GG1, Virg. rectifier and steamers do my bidding. I have some electronics repair experience, but that was work("mouse house pizza/games") it included board, and power supply repair, spanned about 6rys before changing fields. Similar but not the same as train stuff. My schooling in electronics is zilch. I approach things logically, and its always worked out. Ive read at OGF for about 2 yrs, joined in the spring, couldn't resist any longer
An elevated addition, or an offset figure 8 to make one loop larger are my 1st thoughts. Grades for an elevated will require working the throttle more if in conventional. Dark grey you might be able to get the loco reversed by switching, but not the whole train. With a turn out added (yellow) your fig 8 is completed.
This is what I had posted earlier
Just a note: Your name makes me smile every time I see it. "Mr Magoo" was one of my favorite cartoons growing up, Im a bit jealous too.