diff --git a/README.md b/README.md
index 2c4caad..2e1798a 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ Noteworthy Options
 System Requirements
 -----
 - Linux version   : Ubuntu 20.04 LTS, Ubuntu 22.04 LTS or Ubuntu 22.04 LTS for ARM
-- macOS version   : macOS Big Sur 11, macOS Monterey 12 or macOS Ventura 13
+- macOS version   : macOS Monterey 12 or macOS Ventura 13
 - Windows version : Windows Server 2019, Windows Server 2022, Windows 10 Version 22H2 or Windows 11
 
 Download
diff --git a/release-notes.txt b/release-notes.txt
index 4d5d12f..e2724f9 100644
--- a/release-notes.txt
+++ b/release-notes.txt
@@ -14,6 +14,7 @@ Version: 2.2.0 (in development)
 - [INFO] Drop support for Ubuntu 18.04 LTS.
 - [INFO] Drop support for CentOS Linux 7.
 - [INFO] Drop support for Windows 10 Version 21H2.
+- [INFO] Drop support for macOS Big Sur 11.
 
 Version: 2.1.0
 Date: May 17, 2023