diff --git a/images/macos/toolsets/toolset-15.json b/images/macos/toolsets/toolset-15.json
index b1e7f760f..b9030f266 100644
--- a/images/macos/toolsets/toolset-15.json
+++ b/images/macos/toolsets/toolset-15.json
@@ -3,6 +3,13 @@
         "default": "16",
         "x64": {
             "versions": [
+                {
+                    "link": "26_beta",
+                    "version": "26.0.0-Beta+17A5241e",
+                    "symlinks": ["26.0"],
+                    "sha256": "664ad6ec7a3139e9c43b95620c73f8950a802c3d469bb47e6d89f3eab9541b1c",
+                    "install_runtimes": "default"
+                },
                 {
                     "link": "16.4",
                     "version": "16.4.0+16F6",