diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index fd5d5c36a77..e7d94fabc08 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -364,6 +364,7 @@ def library_recipes():
 # Instructions for building packages inside the .mpkg.
 def pkg_recipes():
     unselected_for_python3 = ('selected', 'unselected')[PYTHON_3]
+    unselected_for_lt_python34 = ('selected', 'unselected')[getVersionTuple() < (3, 4)]
     result = [
         dict(
             name="PythonFramework",
@@ -432,10 +433,27 @@ def pkg_recipes():
             topdir="/Library/Frameworks/Python.framework",
             source="/empty-dir",
             required=False,
-            selected=unselected_for_python3,
+            selected=unselected_for_lt_python34,
         ),
     ]
 
+    if getVersionTuple() >= (3, 4):
+        result.append(
+            dict(
+                name="PythonInstallPip",
+                long_name="Install or upgrade pip",
+                readme="""\
+                    This package installs (or upgrades from an earlier version)
+                    pip, a tool for installing and managing Python packages.
+                    """,
+                postflight="scripts/postflight.ensurepip",
+                topdir="/Library/Frameworks/Python.framework",
+                source="/empty-dir",
+                required=False,
+                selected='selected',
+            )
+        )
+
     if DEPTARGET < '10.4' and not PYTHON_3:
         result.append(
             dict(
@@ -453,6 +471,7 @@ def pkg_recipes():
                 selected=unselected_for_python3,
             )
         )
+
     return result
 
 def fatal(msg):
@@ -955,11 +974,13 @@ def buildPython():
     runCommand("%s -C --enable-framework --enable-universalsdk=%s "
                "--with-universal-archs=%s "
                "%s "
+               "%s "
                "LDFLAGS='-g -L%s/libraries/usr/local/lib' "
                "CFLAGS='-g -I%s/libraries/usr/local/include' 2>&1"%(
         shellQuote(os.path.join(SRCDIR, 'configure')), shellQuote(SDKPATH),
         UNIVERSALARCHS,
         (' ', '--with-computed-gotos ')[PYTHON_3],
+        (' ', '--without-ensurepip ')[getVersionTuple() >= (3, 4)],
         shellQuote(WORKDIR)[1:-1],
         shellQuote(WORKDIR)[1:-1]))
 
diff --git a/Mac/BuildScript/resources/ReadMe.txt b/Mac/BuildScript/resources/ReadMe.txt
index 4b3be911bf5..7e885338aeb 100644
--- a/Mac/BuildScript/resources/ReadMe.txt
+++ b/Mac/BuildScript/resources/ReadMe.txt
@@ -17,6 +17,37 @@ instead of double-clicking, control-click or right click the "Python"
 installer package icon.  Then select "Open using ... Installer" from
 the contextual menu that appears.
 
+              **NEW* As of Python 3.4.0b1:
+
+New Installation Options and Defaults
+=====================================
+
+The Python installer now includes an option to automatically install
+or upgrade pip, a tool for installing and managing Python packages.
+This option is enabled by default and no Internet access is required.
+If you do want the installer to do this, select the "Customize" option
+at the "Installation Type" step and uncheck the "Install or ugprade
+pip" option.
+
+To make it easier to use scripts installed by third-party Python
+packages, with pip or by other means, the "Shell profile updater"
+option is now enabled by default, as has been the case with Python
+2.7.x installers. You can also turn this option off by selecting
+"Customize" and unchecking the "Shell profile updater" option. You can
+also update your shell profile later by launching the "Update Shell
+Profile" command found in the /Applications/Python $VERSION folder. You may
+need to start a new terminal window for the changes to take effect.
+
+Python.org Python $VERSION and 2.7.x versions can both be installed and
+will not conflict. Command names for Python 3 contain a 3 in them,
+python3 (or python$VERSION), idle3 (or idle$VERSION), pip3 (or pip$VERSION), etc.
+Python 2.7 command names contain a 2 or no digit: python2 (or
+python2.7 or python), idle2 (or idle2.7 or idle), etc. If you want to
+use pip with Python 2.7.x, you will need to download and install a
+separate copy of it from the Python Package Index
+(https://pypi.python.org/pypi).
+
+
        **** IMPORTANT changes if you use IDLE and Tkinter ****
 
 Installing a third-party version of Tcl/Tk is no longer required
diff --git a/Mac/BuildScript/scripts/postflight.ensurepip b/Mac/BuildScript/scripts/postflight.ensurepip
new file mode 100755
index 00000000000..3b97c4759ec
--- /dev/null
+++ b/Mac/BuildScript/scripts/postflight.ensurepip
@@ -0,0 +1,65 @@
+#!/bin/sh
+#
+# Install/upgrade pip.
+#
+
+PYVER="@PYVER@"
+PYMAJOR="3"
+FWK="/Library/Frameworks/Python.framework/Versions/${PYVER}"
+RELFWKBIN="../../..${FWK}/bin"
+
+umask 022
+
+"${FWK}/bin/python${PYVER}" -m ensurepip --upgrade
+
+"${FWK}/bin/python${PYVER}" -Wi \
+    "${FWK}/lib/python${PYVER}/compileall.py" \
+    -f -x badsyntax \
+    "${FWK}/lib/python${PYVER}/site-packages"
+
+"${FWK}/bin/python${PYVER}" -Wi -O \
+    "${FWK}/lib/python${PYVER}/compileall.py" \
+    -f -x badsyntax \
+    "${FWK}/lib/python${PYVER}/site-packages"
+
+chgrp -R admin "${FWK}/lib/python${PYVER}/site-packages" "${FWK}/bin"
+chmod -R g+w "${FWK}/lib/python${PYVER}/site-packages" "${FWK}/bin"
+
+# We do not know if the user selected the Python command-line tools
+# package that installs symlinks to /usr/local/bin.  So we assume
+# that the command-line tools package has already completed or was
+# not selected and we will only install /usr/local/bin symlinks for
+# pip et al if there are /usr/local/bin/python* symlinks to our
+# framework bin directory.
+
+if [ -d /usr/local/bin ] ; then
+    (
+        cd /usr/local/bin
+        # Create pipx.y and easy_install-x.y links if /usr/local/bin/pythonx.y
+        #   is linked to this framework version
+        if [ "$(readlink -n ./python${PYVER})" = "${RELFWKBIN}/python${PYVER}" ] ; then
+            for fn in "pip${PYVER}" "easy_install-${PYVER}" ;
+            do
+                if [ -e "${RELFWKBIN}/${fn}" ] ; then
+                    rm -f ./${fn}
+                    ln -s "${RELFWKBIN}/${fn}" "./${fn}"
+                    chgrp -h admin "./${fn}"
+                    chmod -h g+w "./${fn}"
+                fi
+            done
+        fi
+        # Create pipx link if /usr/local/bin/pythonx is linked to this version
+        if [ "$(readlink -n ./python${PYMAJOR})" = "${RELFWKBIN}/python${PYMAJOR}" ] ; then
+            for fn in "pip${PYMAJOR}" ;
+            do
+                if [ -e "${RELFWKBIN}/${fn}" ] ; then
+                    rm -f ./${fn}
+                    ln -s "${RELFWKBIN}/${fn}" "./${fn}"
+                    chgrp -h admin "./${fn}"
+                    chmod -h g+w "./${fn}"
+                fi
+            done
+        fi
+    )
+fi
+exit 0
diff --git a/Misc/NEWS b/Misc/NEWS
index f3ad949c379..5a6c4c04528 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -395,6 +395,8 @@ Build
   available to override the default ensurepip "--upgrade" option.  The option
   can also be set with "make [alt]install ENSUREPIP=[upgrade|install\no]".
 
+- Issue #19551: PEP 453 - the OS X installer now installs pip by default.
+
 Tools/Demos
 -----------