/usr/share/X11/xkb/symbols/macintosh_vndr/ is in xkb-data 2.10.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/X11/xkb/symbols/macintosh_vndr/apple
/usr/share/X11/xkb/symbols/macintosh_vndr/ch
/usr/share/X11/xkb/symbols/macintosh_vndr/de
/usr/share/X11/xkb/symbols/macintosh_vndr/dk
/usr/share/X11/xkb/symbols/macintosh_vndr/fi
/usr/share/X11/xkb/symbols/macintosh_vndr/fr
/usr/share/X11/xkb/symbols/macintosh_vndr/gb
/usr/share/X11/xkb/symbols/macintosh_vndr/is
/usr/share/X11/xkb/symbols/macintosh_vndr/it
/usr/share/X11/xkb/symbols/macintosh_vndr/jp
/usr/share/X11/xkb/symbols/macintosh_vndr/latam
/usr/share/X11/xkb/symbols/macintosh_vndr/nl
/usr/share/X11/xkb/symbols/macintosh_vndr/no
/usr/share/X11/xkb/symbols/macintosh_vndr/pt
/usr/share/X11/xkb/symbols/macintosh_vndr/se
/usr/share/X11/xkb/symbols/macintosh_vndr/us