diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 6c4eab3..77ea7ec 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners
-        os: [ macos-12, macos-13, macos-14, macos-latest, windows-2019, windows-2022, windows-latest ]
+        os: [ 'macos-13', 'macos-14', 'macos-latest', 'windows-2019', 'windows-2022', 'windows-latest' ]
         go: [ '1.22' ]
     steps:
 
diff --git a/README.md b/README.md
index 6625f9c..54bbac3 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ Please see details: https://support.claris.com/s/article/Claris-support-policy?l
 
 System Requirements
 -----
-- macOS version   : macOS Monterey 12, macOS Ventura 13 or macOS Sonoma 14
+- macOS version   : macOS Ventura 13 or macOS Sonoma 14
 - Windows version : Windows 10 Version 22H2 or Windows 11
 
 
diff --git a/release-notes.txt b/release-notes.txt
index 345c815..fb83ead 100644
--- a/release-notes.txt
+++ b/release-notes.txt
@@ -3,7 +3,7 @@ XMLPaste
 This software is distributed under the MIT License.
 
 Version: 1.1.1 (in development)
--
+- [INFO] Drop support for macOS Monterey 12.
 
 Version: 1.1.0
 Date: August 6, 2024