diff --git a/Doc/library/idle.rst b/Doc/library/idle.rst
index c842b2639cc..24e22c103de 100644
--- a/Doc/library/idle.rst
+++ b/Doc/library/idle.rst
@@ -248,7 +248,8 @@ Configure IDLE
    help sources can be specified.  Non-default user setting are saved in a
    .idlerc directory in the user's home directory.  Problems caused by bad user
    configuration files are solved by editing or deleting one or more of the
-   files in .idlerc.
+   files in .idlerc.  On OS X, open the configuration dialog by selecting
+   Preferences in the application menu.
 
 Configure Extensions
    Open a configuration dialog for setting preferences for extensions
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index bdb18bc41fa..e7e3262f9e1 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -47,7 +47,7 @@ test runner
    Module :mod:`doctest`
       Another test-support module with a very different flavor.
 
-   `Simple Smalltalk Testing: With Patterns <http://www.XProgramming.com/testfram.htm>`_
+   `Simple Smalltalk Testing: With Patterns <https://web.archive.org/web/20150315073817/http://www.xprogramming.com/testfram.htm>`_
       Kent Beck's original paper on testing frameworks using the pattern shared
       by :mod:`unittest`.
 
diff --git a/Lib/idlelib/help.txt b/Lib/idlelib/help.txt
index 7eff3700405..95401734984 100644
--- a/Lib/idlelib/help.txt
+++ b/Lib/idlelib/help.txt
@@ -129,7 +129,9 @@ Options Menu (Shell and Editor):
         Configure IDLE -- Open a configuration dialog.  Fonts, indentation,
                           keybindings, and color themes may be altered.
                           Startup Preferences may be set, and additional Help
-                          sources can be specified.
+                          sources can be specified.  On OS X, open the
+                          configuration dialog by selecting Preferences
+                          in the application menu.
 
         ---
         Code Context (toggle) -- Open a pane at the top of the edit window
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 872828967ea..7fe5512af58 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -237,9 +237,9 @@ def library_recipes():
 
         result.extend([
           dict(
-              name="OpenSSL 1.0.2a",
-              url="https://www.openssl.org/source/openssl-1.0.2a.tar.gz",
-              checksum='a06c547dac9044161a477211049f60ef',
+              name="OpenSSL 1.0.2c",
+              url="https://www.openssl.org/source/openssl-1.0.2c.tar.gz",
+              checksum='8c8d81a9ae7005276e486702edbcd4b6',
               patches=[
                   "openssl_sdk_makedepend.patch",
                    ],
diff --git a/Mac/BuildScript/openssl_sdk_makedepend.patch b/Mac/BuildScript/openssl_sdk_makedepend.patch
index 5903afdbff1..74d712115bd 100644
--- a/Mac/BuildScript/openssl_sdk_makedepend.patch
+++ b/Mac/BuildScript/openssl_sdk_makedepend.patch
@@ -2,7 +2,7 @@
 # Parent  25a9af415e8c3faf591c360d5f0e361d049b2b43
 # openssl_sdk_makedepend.patch
 #
-# 	using openssl 1.0.2a
+# 	using openssl 1.0.2c
 #
 # - support building with an OS X SDK
 # - allow "make depend" to use compilers with names other than "gcc"
diff --git a/Misc/NEWS b/Misc/NEWS
index 9e78e77df78..d209195c383 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -342,8 +342,8 @@ Build
 - Issue #23445: pydebug builds now use "gcc -Og" where possible, to make
   the resulting executable faster.
 
-- Issue #23686: Update OS X 10.5 installer and Windows builds to use
-  OpenSSL 1.0.2a.
+- Issue #24432: Update Windows builds and OS X 10.5 installer to use OpenSSL
+  1.0.2c.
 
 C API
 -----
diff --git a/PCbuild/get_externals.bat b/PCbuild/get_externals.bat
index 3836ee468cd..8ece4e32c50 100644
--- a/PCbuild/get_externals.bat
+++ b/PCbuild/get_externals.bat
@@ -54,7 +54,7 @@ echo.Fetching external libraries...
 for %%e in (
             bzip2-1.0.6
             nasm-2.11.06
-            openssl-1.0.2a
+            openssl-1.0.2c
             tcl-8.6.1.0
             tk-8.6.1.0
             tix-8.4.3.4
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index 7e6c7dd0eb7..26fd569fc4b 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -20,7 +20,7 @@
     <sqlite3Dir>$(externalsDir)\sqlite-3.8.3.1</sqlite3Dir>
     <bz2Dir>$(externalsDir)\bzip2-1.0.6</bz2Dir>
     <lzmaDir>$(externalsDir)\xz-5.0.5</lzmaDir>
-    <opensslDir>$(externalsDir)\openssl-1.0.2a</opensslDir>
+    <opensslDir>$(externalsDir)\openssl-1.0.2c</opensslDir>
     <tcltkDir>$(externalsDir)\tcltk</tcltkDir>
     <tcltk64Dir>$(externalsDir)\tcltk64</tcltk64Dir>
     <tcltkLib>$(tcltkDir)\lib\tcl86t.lib;$(tcltkDir)\lib\tk86t.lib</tcltkLib>
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index c27af9989b7..5b3e9809096 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -171,7 +171,7 @@ _lzma
     Homepage:
         http://tukaani.org/xz/
 _ssl
-    Python wrapper for version 1.0.2a of the OpenSSL secure sockets
+    Python wrapper for version 1.0.2c of the OpenSSL secure sockets
     library, which is built by ssl.vcxproj
     Homepage:
         http://www.openssl.org/