diff --git a/recipes/recipe_modules/osx_sdk/api.py b/recipes/recipe_modules/osx_sdk/api.py
index e8b814abf..053bff6ea 100644
--- a/recipes/recipe_modules/osx_sdk/api.py
+++ b/recipes/recipe_modules/osx_sdk/api.py
@@ -15,7 +15,7 @@ from recipe_engine import recipe_api
 # implemented with a proto message.
 _PROPERTY_DEFAULTS = {
     'toolchain_pkg': 'infra/tools/mac_toolchain/${platform}',
-    'toolchain_ver': 'git_revision:59ddedfe3849abf560cbe0b41bb8e431041cd2bb',
+    'toolchain_ver': 'git_revision:26bb3effce1bc1896a3776c21b84e76ae82c3917',
 }
 
 # Rationalized from https://en.wikipedia.org/wiki/Xcode.
diff --git a/recipes/recipe_modules/osx_sdk/examples/full.expected/ancient_version.json b/recipes/recipe_modules/osx_sdk/examples/full.expected/ancient_version.json
index abfffd6ac..da94fdf10 100644
--- a/recipes/recipe_modules/osx_sdk/examples/full.expected/ancient_version.json
+++ b/recipes/recipe_modules/osx_sdk/examples/full.expected/ancient_version.json
@@ -6,7 +6,7 @@
       "-root",
       "[CACHE]/osx_sdk",
       "-ensure-file",
-      "infra/tools/mac_toolchain/${platform} git_revision:59ddedfe3849abf560cbe0b41bb8e431041cd2bb",
+      "infra/tools/mac_toolchain/${platform} git_revision:26bb3effce1bc1896a3776c21b84e76ae82c3917",
       "-max-threads",
       "0",
       "-json-output",
@@ -19,7 +19,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
-      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:59d\",@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:26b\",@@@",
       "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",
diff --git a/recipes/recipe_modules/osx_sdk/examples/full.expected/automatic_version.json b/recipes/recipe_modules/osx_sdk/examples/full.expected/automatic_version.json
index ec76a1ae5..5d48f9f50 100644
--- a/recipes/recipe_modules/osx_sdk/examples/full.expected/automatic_version.json
+++ b/recipes/recipe_modules/osx_sdk/examples/full.expected/automatic_version.json
@@ -6,7 +6,7 @@
       "-root",
       "[CACHE]/osx_sdk",
       "-ensure-file",
-      "infra/tools/mac_toolchain/${platform} git_revision:59ddedfe3849abf560cbe0b41bb8e431041cd2bb",
+      "infra/tools/mac_toolchain/${platform} git_revision:26bb3effce1bc1896a3776c21b84e76ae82c3917",
       "-max-threads",
       "0",
       "-json-output",
@@ -19,7 +19,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
-      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:59d\",@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:26b\",@@@",
       "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",
diff --git a/recipes/recipe_modules/osx_sdk/examples/full.expected/explicit_version.json b/recipes/recipe_modules/osx_sdk/examples/full.expected/explicit_version.json
index 08bf37b25..4c1659b92 100644
--- a/recipes/recipe_modules/osx_sdk/examples/full.expected/explicit_version.json
+++ b/recipes/recipe_modules/osx_sdk/examples/full.expected/explicit_version.json
@@ -6,7 +6,7 @@
       "-root",
       "[CACHE]/osx_sdk",
       "-ensure-file",
-      "infra/tools/mac_toolchain/${platform} git_revision:59ddedfe3849abf560cbe0b41bb8e431041cd2bb",
+      "infra/tools/mac_toolchain/${platform} git_revision:26bb3effce1bc1896a3776c21b84e76ae82c3917",
       "-max-threads",
       "0",
       "-json-output",
@@ -19,7 +19,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
-      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:59d\",@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:26b\",@@@",
       "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",
diff --git a/recipes/recipe_modules/osx_sdk/examples/full.expected/mac.json b/recipes/recipe_modules/osx_sdk/examples/full.expected/mac.json
index f68d0ccdb..94c5ab27d 100644
--- a/recipes/recipe_modules/osx_sdk/examples/full.expected/mac.json
+++ b/recipes/recipe_modules/osx_sdk/examples/full.expected/mac.json
@@ -6,7 +6,7 @@
       "-root",
       "[CACHE]/osx_sdk",
       "-ensure-file",
-      "infra/tools/mac_toolchain/${platform} git_revision:59ddedfe3849abf560cbe0b41bb8e431041cd2bb",
+      "infra/tools/mac_toolchain/${platform} git_revision:26bb3effce1bc1896a3776c21b84e76ae82c3917",
       "-max-threads",
       "0",
       "-json-output",
@@ -19,7 +19,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
-      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:59d\",@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:26b\",@@@",
       "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",