Well known problem. MacOS launcher does not work anymore because of a missing library. No big deal, using fgfs.sh.
Number 2.
Enabling the "Simplify FAR terrain" (and surely not ALL terrain) causes my plane to be below or above ground at times. Happened at LEMD airport taxying around 18R and 18L
Number 3.
If I move out of flightgear window (CMD+TAB or moving to a different workspace), when the focus is regained by flightgear mouse controls don't work. I discovered they work again if I hit the ALT key.
ATIS is not working.
Ok this one might be caused by reusing old planes which need the new comm-radio stuff.