diff --git a/.gitignore b/.gitignore
index 762a6d9e9..65510bc38 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,8 @@ webkitbuilds/*
 !webkitbuilds/setup-win64.iss
 !webkitbuilds/favicon.ico
 !webkitbuilds/.desktop
+!webkitbuilds/build-osx.sh
+!webkitbuilds/Background.png
 
 # chrome extensions
 browser-extensions/chrome/copay-chrome-extension
diff --git a/Gruntfile.js b/Gruntfile.js
index 98e6ef651..4b4533a27 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -11,10 +11,10 @@ module.exports = function(grunt) {
         command: 'rm -Rf bower_components node_modules'
       },
       osx64: {
-        command: 'hdiutil create  -megabytes 150 -volname Copay -srcfolder webkitbuilds/copay/osx64/copay.app/ -ov -format UDZO webkitbuilds/copay-osx64.dmg'
+        command: 'webkitbuilds/build-osx.sh osx64'
       },
       osx32: {
-        command: 'hdiutil create  -megabytes 150 -volname Copay -srcfolder webkitbuilds/copay/osx32/copay.app/ -ov -format UDZO webkitbuilds/copay-osx32.dmg'
+        command: 'webkitbuilds/build-osx.sh osx32'
       }
     },
     watch: {
diff --git a/webkitbuilds/Background.png b/webkitbuilds/Background.png
new file mode 100755
index 000000000..7cdaf6ed9
Binary files /dev/null and b/webkitbuilds/Background.png differ
diff --git a/webkitbuilds/build-osx.sh b/webkitbuilds/build-osx.sh
new file mode 100755
index 000000000..6f3edfc42
--- /dev/null
+++ b/webkitbuilds/build-osx.sh
@@ -0,0 +1,124 @@
+#!/bin/bash
+
+# by Andy Maloney
+# http://asmaloney.com/2013/07/howto/packaging-a-mac-os-x-application-using-a-dmg/
+
+# make sure we are in the correct dir when we double-click a .command file
+dir=${0%/*}
+if [ -d "$dir" ]; then
+  cd "$dir"
+fi
+
+# set up your app name, architecture, and background image file name
+APP_NAME="copay"
+ARCH="$1"
+DMG_BACKGROUND_IMG="Background.png"
+
+PATH_NAME="copay/$1/"
+# you should not need to change these
+APP_EXE="${PATH_NAME}${APP_NAME}.app/Contents/MacOS/nwjs"
+
+VOL_NAME="${APP_NAME}-${ARCH}"
+DMG_TMP="${VOL_NAME}-temp.dmg"
+DMG_FINAL="${VOL_NAME}.dmg"
+STAGING_DIR="tmp"
+
+# Check the background image DPI and convert it if it isn't 72x72
+_BACKGROUND_IMAGE_DPI_H=`sips -g dpiHeight ${DMG_BACKGROUND_IMG} | grep -Eo '[0-9]+\.[0-9]+'`
+_BACKGROUND_IMAGE_DPI_W=`sips -g dpiWidth ${DMG_BACKGROUND_IMG} | grep -Eo '[0-9]+\.[0-9]+'`
+
+if [ $(echo " $_BACKGROUND_IMAGE_DPI_H != 72.0 " | bc) -eq 1 -o $(echo " $_BACKGROUND_IMAGE_DPI_W != 72.0 " | bc) -eq 1 ]; then
+   echo "WARNING: The background image's DPI is not 72.  This will result in distorted backgrounds on Mac OS X 10.7+."
+   echo "         I will convert it to 72 DPI for you."
+   
+   _DMG_BACKGROUND_TMP="${DMG_BACKGROUND_IMG%.*}"_dpifix."${DMG_BACKGROUND_IMG##*.}"
+
+   sips -s dpiWidth 72 -s dpiHeight 72 ${DMG_BACKGROUND_IMG} --out ${_DMG_BACKGROUND_TMP}
+   
+   DMG_BACKGROUND_IMG="${_DMG_BACKGROUND_TMP}"
+fi
+
+# clear out any old data
+rm -rf "${STAGING_DIR}" "${DMG_TMP}" "${DMG_FINAL}"
+
+# copy over the stuff we want in the final disk image to our staging dir
+mkdir -p "${STAGING_DIR}"
+cp -rpf "${PATH_NAME}${APP_NAME}.app" "${STAGING_DIR}"
+# ... cp anything else you want in the DMG - documentation, etc.
+
+pushd "${STAGING_DIR}"
+
+popd
+
+# figure out how big our DMG needs to be
+#  assumes our contents are at least 1M!
+SIZE=`du -sh "${STAGING_DIR}" | sed 's/\([0-9\.]*\)M\(.*\)/\1/'` 
+SIZE=`echo "${SIZE} + 1.0" | bc | awk '{print int($1+0.5)}'`
+
+if [ $? -ne 0 ]; then
+   echo "Error: Cannot compute size of staging dir"
+   exit
+fi
+
+# create the temp DMG file
+hdiutil create -srcfolder "${STAGING_DIR}" -volname "${VOL_NAME}" -fs HFS+ \
+      -fsargs "-c c=64,a=16,e=16" -format UDRW -size ${SIZE}M "${DMG_TMP}"
+
+echo "Created DMG: ${DMG_TMP}"
+
+# mount it and save the device
+DEVICE=$(hdiutil attach -readwrite -noverify "${DMG_TMP}" | \
+         egrep '^/dev/' | sed 1q | awk '{print $1}')
+
+sleep 2
+
+# add a link to the Applications dir
+echo "Add link to /Applications"
+pushd /Volumes/"${VOL_NAME}"
+ln -s /Applications
+popd
+
+# add a background image
+mkdir /Volumes/"${VOL_NAME}"/.background
+cp "${DMG_BACKGROUND_IMG}" /Volumes/"${VOL_NAME}"/.background/
+
+# tell the Finder to resize the window, set the background,
+#  change the icon size, place the icons in the right position, etc.
+echo '
+   tell application "Finder"
+     tell disk "'${VOL_NAME}'"
+           open
+           set current view of container window to icon view
+           set toolbar visible of container window to false
+           set statusbar visible of container window to false
+           set the bounds of container window to {400, 100, 920, 440}
+           set viewOptions to the icon view options of container window
+           set arrangement of viewOptions to not arranged
+           set icon size of viewOptions to 72
+           set background picture of viewOptions to file ".background:'${DMG_BACKGROUND_IMG}'"
+           set position of item "'${APP_NAME}'.app" of container window to {160, 205}
+           set position of item "Applications" of container window to {360, 205}
+           close
+           open
+           update without registering applications
+           delay 2
+     end tell
+   end tell
+' | osascript
+
+sync
+
+# unmount it
+hdiutil detach "${DEVICE}"
+
+# now make the final image a compressed disk image
+echo "Creating compressed image"
+hdiutil convert "${DMG_TMP}" -format UDZO -imagekey zlib-level=9 -o "${DMG_FINAL}"
+
+# clean up
+rm -rf "${DMG_TMP}"
+rm -rf "${STAGING_DIR}"
+
+echo 'Done.'
+
+exit