diff --git a/macbuild/ReadMe.md b/macbuild/ReadMe.md
index db8cd76916..4d2fbea10a 100644
--- a/macbuild/ReadMe.md
+++ b/macbuild/ReadMe.md
@@ -1,6 +1,6 @@
-Relevant KLayout version: 0.28.14<br>
+Relevant KLayout version: 0.28.15<br>
 Author: Kazzz-S<br>
-Last modified: 2023-12-10<br>
+Last modified: 2024-01-05<br>
 
 # 1. Introduction
 This directory **`macbuild`** contains various files required for building KLayout (http://www.klayout.de/) version 0.28.13 or later for different 64-bit macOS, including:
@@ -81,7 +81,7 @@ $ [python] ./build4mac.py
                         :    Sys: use [Sonoma|Ventura|Monterey]-bundled Ruby 2.6         |
                         :   MP32: use Ruby 3.2 from MacPorts                             |
                         :   HB32: use Ruby 3.2 from Homebrew                             |
-                        :   Ana3: use Ruby 3.1 from Anaconda3                            |
+                        :   Ana3: use Ruby 3.2 from Anaconda3                            |
    [-p|--python <type>] : case-insensitive type=['nil', 'MP311', 'HB311', 'Ana3',        | hb311
                         :                        'MP39', 'hb311', 'HBAuto']              |
                         :    nil: don't bind Python                                      |
@@ -215,10 +215,10 @@ $ ./build4mac.py -q qt5macports -r mp32 -p mp311 -Y
 * "Rmp32Pmp311" means that Ruby is 3.2 from MacPorts; Python is 3.11 from MacPorts.
 4. Copy/move the generated application bundle **`klayout.app`** to your **`/Applications`** directory for installation.
 
-### 6E. Fully Anaconda3-flavored build with Anaconda3 Ruby 3.1 and Anaconda3 Python 3.11
-0. Install Anaconda3 (Anaconda3-2023.09-0-MacOSX-x86_64.pkg), then install Ruby 3.1 and libgit2 by
+### 6E. Fully Anaconda3-flavored build with Anaconda3 Ruby 3.2 and Anaconda3 Python 3.11
+0. Install Anaconda3 (Anaconda3-2023.09-0-MacOSX-x86_64.pkg), then install Ruby 3.2 and libgit2 by
 ```
-$ conda install ruby=3.1.4
+$ conda install ruby=3.2.2
 $ conda install -c conda-forge libgit2
 ```
 
@@ -239,7 +239,7 @@ $ ./build4mac.py -q qt5ana3 -r ana3 -p ana3 -Y
   **`LW-qt5Ana3.pkg.macos-Monterey-release-Rana3Pana3`** directory, where
 * "LW-"        means this is a lightweight package.
 * "qt5Ana3"    means that Qt5 from Anaconda3 is used.
-* "Rana3Pana3" means that Ruby (3.1) is from Anaconda3; Python (3.11) is from Anaconda3.
+* "Rana3Pana3" means that Ruby (3.2) is from Anaconda3; Python (3.11) is from Anaconda3.
 4. Copy/move the generated application bundle **`klayout.app`** to your **`/Applications`** directory for installation.
 5. You may have to set the `PYTHONHOME` environment variable like:
 ```
diff --git a/macbuild/Resources/script-bundle-A.zip b/macbuild/Resources/script-bundle-A.zip
index ba3f6cd88e..5f21746d85 100644
Binary files a/macbuild/Resources/script-bundle-A.zip and b/macbuild/Resources/script-bundle-A.zip differ
diff --git a/macbuild/Resources/script-bundle-B.zip b/macbuild/Resources/script-bundle-B.zip
index 99620dbfcc..3f66e0a955 100644
Binary files a/macbuild/Resources/script-bundle-B.zip and b/macbuild/Resources/script-bundle-B.zip differ
diff --git a/macbuild/Resources/script-bundle-H.zip b/macbuild/Resources/script-bundle-H.zip
index bf5a808e0b..821e0e51cd 100644
Binary files a/macbuild/Resources/script-bundle-H.zip and b/macbuild/Resources/script-bundle-H.zip differ
diff --git a/macbuild/Resources/script-bundle-P.zip b/macbuild/Resources/script-bundle-P.zip
index c018c3a720..def41bdc47 100644
Binary files a/macbuild/Resources/script-bundle-P.zip and b/macbuild/Resources/script-bundle-P.zip differ
diff --git a/macbuild/build4mac.py b/macbuild/build4mac.py
index 78e32c20db..117d59bcda 100755
--- a/macbuild/build4mac.py
+++ b/macbuild/build4mac.py
@@ -63,7 +63,7 @@ def GenerateUsage(platform):
     usage += "                        :    Sys: use [Sonoma|Ventura|Monterey]-bundled Ruby 2.6         |\n"
     usage += "                        :   MP32: use Ruby 3.2 from MacPorts                             |\n"
     usage += "                        :   HB32: use Ruby 3.2 from Homebrew                             |\n"
-    usage += "                        :   Ana3: use Ruby 3.1 from Anaconda3                            |\n"
+    usage += "                        :   Ana3: use Ruby 3.2 from Anaconda3                            |\n"
     usage += "   [-p|--python <type>] : case-insensitive type=['nil', 'MP311', 'HB311', 'Ana3',        | %s\n" % myPython
     usage += "                        :                        'MP39', 'HB39', 'HBAuto']               |\n"
     usage += "                        :    nil: don't bind Python                                      |\n"
diff --git a/macbuild/build4mac_env.py b/macbuild/build4mac_env.py
index 2074d5c14c..d87149133b 100755
--- a/macbuild/build4mac_env.py
+++ b/macbuild/build4mac_env.py
@@ -167,13 +167,13 @@
                     'lib': '%s/lib/libruby.3.2.dylib' % HBRuby32Path
                   }
 
-# Ruby 3.1 bundled with anaconda3 installed under /Applications/anaconda3/
+# Ruby 3.2 bundled with anaconda3 installed under /Applications/anaconda3/
 # The standard installation deploys the tool under $HOME/opt/anaconda3/.
 # If so, you need to make a symbolic link: /Applications/anaconda3 ---> $HOME/opt/anaconda3/
 # [Key Type Name] = 'Ana3'
 RubyAnaconda3   = { 'exe': '/Applications/anaconda3/bin/ruby',
-                    'inc': '/Applications/anaconda3/include/ruby-3.1.0',
-                    'lib': '/Applications/anaconda3/lib/libruby.3.1.dylib'
+                    'inc': '/Applications/anaconda3/include/ruby-3.2.0',
+                    'lib': '/Applications/anaconda3/lib/libruby.3.2.dylib'
                   }
 
 # Consolidated dictionary kit for Ruby