Here is what my dosbox-staging config looks like:
This assumes the whole Albion folder from GOG is in ~/Applications/DOS/ALBION
[sdl]
fullscreen = true
output = texturepp
windowresolution = resizable
[render]
scaler = none
glshader = none
[autoexec]
mixer sb reverse
mount c ~/Applications/DOS
imgmount d ~/Applications/DOS/ALBION/game.ins -t iso -fs iso
c:
dir
cd ALBION
ALBION.EXE
Then I run the dosbox from ~/Applications/DOS like so:
/Applications/dosbox-staging.app/Contents/MacOS/dosbox -conf dosbox-albion.conf