From ff11a95962cd81b042c37235ea3901042680eafd Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Fri, 24 Jan 2025 10:58:35 -0500
Subject: [PATCH] Help: Clarify cmake_host_system_information OS_NAME

Fixes: #26631
---
 Help/command/cmake_host_system_information.rst | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Help/command/cmake_host_system_information.rst b/Help/command/cmake_host_system_information.rst
index 0d2f75e12f..be8aeba43d 100644
--- a/Help/command/cmake_host_system_information.rst
+++ b/Help/command/cmake_host_system_information.rst
@@ -129,7 +129,15 @@ queried.  The list of queried values is stored in ``<variable>``.
 ``OS_NAME``
   .. versionadded:: 3.10
 
-  See :variable:`CMAKE_HOST_SYSTEM_NAME`
+  The host operating system name:
+
+  * On UNIX platforms, this is ``uname -s``.
+
+  * On Apple platforms, this is ``sw_vers -productName``.
+
+  * On Windows, this is ``Windows``.
+
+  See also :variable:`CMAKE_HOST_SYSTEM_NAME`.
 
 ``OS_RELEASE``
   .. versionadded:: 3.10