Thanks for trying to assist. The A/P will only engage if the AT is disengaged. (Not sure how to give you more detail here)
I fly all 737's (PMDG, XP11 Default, Zibo) the same way. I set AT limit and have FMS programmed and ready to go. After crossing thru 400ft, I engage the A/P and it just alarms... (Yes, the plane is trimmed!)
If I kill the AT, I can enable the A/P but when I activate the LNAV, it does not engage. Instead the orange FMC button lights up. I have not figured out how to get this working.
My main intent was to find out if this release was Windows only or Mac compatible. It is worth mentioning that I am running a virgin install of X-Plane 11.55 without any plugins... I am also running on an M1 MacBook Air (which runs X-Plane 11 great!)
Thanks again!