Follow up to this ... weirdly (or at least, I wouldn't have expected it), moving the '-X' after the Pi's IP address allowed things to start working (so "ssh <Pi's IP addr> -X"). Once logged into the Pi, I can spin up either lxsession or /etc/X11/Xsession and these desktop windows open on the Mac. There's still the question of whether the standard X11 apps (xeyes, etc.) are missing from the Pi Debian distro, but at least the connectivity issue seems resolved.
Statistics: Posted by shawnc1959 — Fri Apr 11, 2025 6:04 pm