From 49e6dbbbf893368e213eca36b7912a416b19d26d Mon Sep 17 00:00:00 2001
From: Katherine Reynolds <7054971+reynoldskr@users.noreply.github.com>
Date: Wed, 22 Oct 2025 19:27:05 -0700
Subject: [PATCH 1/2] Updated DesktopOsHelper.IsMac to work properly on net10 +
 macOS 26

---
 .../PlatformsCommon/Shared/DesktopOsHelper.cs                | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs b/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs
index f9e6e8aa33..97f6bf1819 100644
--- a/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs
+++ b/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs
@@ -53,7 +53,10 @@ public static bool IsMac()
             return Environment.OSVersion.Platform == PlatformID.MacOSX;
 #elif NET8_0_OR_GREATER
             string OSDescription = RuntimeInformation.OSDescription;
-            return OSDescription.Contains("Darwin", StringComparison.OrdinalIgnoreCase);
+
+            // .NET 10 and later changes the OS string in `OSDescription`
+            return OSDescription.Contains("Darwin", StringComparison.OrdinalIgnoreCase) ||
+                   OSDescription.Contains("macOS", StringComparison.OrdinalIgnoreCase);
 #else
             return RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
 #endif

From a18c778dc829aae07257c1264dca29d57b128421 Mon Sep 17 00:00:00 2001
From: Katherine Reynolds <7054971+reynoldskr@users.noreply.github.com>
Date: Wed, 3 Dec 2025 11:35:44 -0800
Subject: [PATCH 2/2] Simplified MacOS detection

---
 .../PlatformsCommon/Shared/DesktopOsHelper.cs               | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs b/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs
index 97f6bf1819..d6c67212fe 100644
--- a/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs
+++ b/src/client/Microsoft.Identity.Client/PlatformsCommon/Shared/DesktopOsHelper.cs
@@ -52,11 +52,7 @@ public static bool IsMac()
 #elif NETFRAMEWORK
             return Environment.OSVersion.Platform == PlatformID.MacOSX;
 #elif NET8_0_OR_GREATER
-            string OSDescription = RuntimeInformation.OSDescription;
-
-            // .NET 10 and later changes the OS string in `OSDescription`
-            return OSDescription.Contains("Darwin", StringComparison.OrdinalIgnoreCase) ||
-                   OSDescription.Contains("macOS", StringComparison.OrdinalIgnoreCase);
+            return OperatingSystem.IsMacOS();
 #else
             return RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
 #endif