diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 2e86bb22d..bbdc14ab5 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,5 +1,9 @@
 CHANGE LOG: Zinc Library
 
+v4.2.1
+Update minimum version of CMake required to 3.18.
+CI infrastructure fixes.
+
 v4.2.0
 Fix bug for export of single element line to webGL.
 Fix undefined element field segfault.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63baef598..0ba3813bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,27 +5,18 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-cmake_minimum_required(VERSION 3.10.0)
-cmake_policy(VERSION 3.10.0)
+cmake_minimum_required(VERSION 3.18.0)
+cmake_policy(VERSION 3.18.0)
 
-if(POLICY CMP0072)
-    cmake_policy(SET CMP0072 NEW)
-endif()
-
-if(POLICY CMP0074)
-    cmake_policy(SET CMP0074 NEW)
-endif()
-
-if(POLICY CMP0078)
-    cmake_policy(SET CMP0078 NEW)
-endif()
-
-if(POLICY CMP0086)
-    cmake_policy(SET CMP0086 NEW)
-endif()
+set(POLICIES CMP0072 CMP0074 CMP0078 CMP0086 CMP0126)
+foreach(P ${POLICIES})
+    if(POLICY ${P})
+        cmake_policy(SET ${P} NEW)
+    endif()
+endforeach()
 
 # This is the project name and shows up in IDEs
-project(Zinc VERSION 4.2.0 LANGUAGES C CXX)
+project(Zinc VERSION 4.2.1 LANGUAGES C CXX)
 
 # Set this to the development release or release candidate version.
 set(Zinc_VERSION_DEVELOPER "")
diff --git a/cmake/ZincPackaging.cmake b/cmake/ZincPackaging.cmake
index a6a11e075..2533cce16 100644
--- a/cmake/ZincPackaging.cmake
+++ b/cmake/ZincPackaging.cmake
@@ -42,7 +42,7 @@ ELSEIF( APPLE )
     SET( CPACK_RESOURCE_FILE_WELCOME "${CMAKE_CURRENT_SOURCE_DIR}/distrib/osx/welcome.txt" )
     LIST( LENGTH LENGTH_ARCHS CMAKE_OSX_ARCHITECTURES )
 
-    SET( ZINC_ARCHITECTURE "universal" )
+    SET( ZINC_ARCHITECTURE "${CMAKE_HOST_SYSTEM_PROCESSOR}" )
     SET( CPACK_GENERATOR  "TGZ" "productbuild" )
 ELSEIF( UNIX )
     # Preserve the CMAKE_INSTALL_PREFIX for the project and work with absolute install