How to get the Mac "Command" key to work as Meta in xterm

cp /private/etc/X11/xinit/xinitrc ~/.xinitrc

cat >~/.Xresources <<EOF
xterm*metaSendsEscape: true
xterm*saveLines: 10000
xterm*scrollBar: true
xterm*rightScrollBar: true
xterm*jumpScroll: true
EOF

xrdb -merge ~/.Xresources