Installation or update xquartz on OS X

di-xquartz.sh

#!/bin/bash -f
# Download and install (or update) Xquartz

APP_PATH='/Applications/Utilities/XQuartz.app'

UPDATES_URL='http://xquartz.macosforge.org/downloads/sparkle/release.xml'

DOWNLOAD_ACTUAL=`curl -sL "$UPDATES_URL" | tr '"' '\012' | egrep '^http.*\.dmg' | head -1`

REMOTE_VERSION=`curl -sL "$UPDATES_URL" | awk -F'"' '/sparkle:version=/{print $4}' | head -1`

LOCAL_VERSION=`defaults read "${APP_PATH}/Contents/Info.plist" "CFBundleVersion" 2>/dev/null`

FILENAME="$DOWNLOAD_ACTUAL"

IMG=`echo "$FILENAME" | awk -F'/' '{print $NF}'`

TEVAL=0

if [ "$REMOTE_VERSION" = "" ]
then
      echo "REMOTE_VERSION is empty, cannot continue"
      exit 0
fi

if [ "$DOWNLOAD_ACTUAL" = "" ]
then
      echo "DOWNLOAD_ACTUAL is empty, cannot continue"
      exit 0
fi   


if [ "$LOCAL_VERSION" = "$REMOTE_VERSION" ]
then
      echo "$APP_PATH is up-to-date ($LOCAL_VERSION ~ $REMOTE_VERSION)"
      exit 0
else
         # Update Needed
      echo "$APP_PATH is outdated ($LOCAL_VERSION vs $REMOTE_VERSION)"
fi

cd "$HOME/Downloads" || cd "$HOME/Desktop" || cd "$HOME" || cd /tmp

if [ -f "$IMG" ]
then
      LOCAL_MD5=`md5 $IMG | awk '{print $NF}'`
      REMOTE_MD5=`curl -sL "${DOWNLOAD_ACTUAL}".md5sum | awk '{print $1}'`

      if [ "$LOCAL_MD5" == "$REMOTE_MD5" ]
      then
            echo "$IMG already downloaded."
            TEVAL=1
      fi
fi

if [ ${TEVAL} -eq 0 ]
then
      wget -O "$IMG" "$FILENAME"

      if [ $? -ne 0 ]
      then
            echo "Download $IMG failure."
            exit 1;
      fi
fi

MNTPNT=$(echo -n "Y" | hdid -plist "$IMG" 2>/dev/null | fgrep -A 1 '<key>mount-point</key>' | tail -1 | sed 's#</string>.*##g ; s#.*<string>##g')

if [ "$MNTPNT" = "" ]
then
      echo "MNTPNT is empty"
      exit 1
fi

PKG=`find "$MNTPNT" -maxdepth 1 -iname \*.pkg`

if [ "$PKG" = "" ]
then
      echo "PKG is empty"
      exit 1
fi

echo "Installing $PKG (this may take awhile...)"

sudo installer -pkg "$PKG" -target / -lang en 2>&1

EXIT="$?"

if [ "$EXIT" = "0" ]
then
      echo "Successfully installed XQuartz.app version $REMOTE_VERSION"

      COUNT='0'

      while [ -e "$MNTPNT" ]
      do
            ((COUNT++))

            if [ "$COUNT" -gt "10" ]
            then
                   exit 0
            fi
         # unmount the DMG
           diskutil unmount "$MNTPNT" || sleep 5
      done

      if [ ! -e "$MNTPNT" ]
      then
            echo "Unmounted $MNTPNT"
      fi

      exit 0

else
      echo "FAILED to install XQuartz.app version $REMOTE_VERSION (exit = $EXIT)"
      exit 1
fi


exit 0

Thank you for posting this