diff --git a/recipes/recipe_modules/osx_sdk/api.py b/recipes/recipe_modules/osx_sdk/api.py
index 3a3821653..abf8d4f5f 100644
--- a/recipes/recipe_modules/osx_sdk/api.py
+++ b/recipes/recipe_modules/osx_sdk/api.py
@@ -14,8 +14,8 @@ from recipe_engine import recipe_api
 # TODO(iannucci): replace this with something sane when PROPERTIES is
 # implemented with a proto message.
 _PROPERTY_DEFAULTS = {
-  'toolchain_pkg': 'infra/tools/mac_toolchain/${platform}',
-  'toolchain_ver': 'git_revision:723fc1a6c8cdf2631a57851f5610e598db0c1de1',
+    'toolchain_pkg': 'infra/tools/mac_toolchain/${platform}',
+    'toolchain_ver': 'git_revision:248bbfc433c8e2fc4e3536d8f58477724ce7110d',
 }
 
 # 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 8cc4536e1..51435769e 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/${platform} git_revision:723fc1a6c8cdf2631a57851f5610e598db0c1de1",
+      "infra/tools/mac_toolchain/${platform} git_revision:248bbfc433c8e2fc4e3536d8f58477724ce7110d",
       "-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:723\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:248\", @@@",
       "@@@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 f64e99b9b..8fe7c7d96 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/${platform} git_revision:723fc1a6c8cdf2631a57851f5610e598db0c1de1",
+      "infra/tools/mac_toolchain/${platform} git_revision:248bbfc433c8e2fc4e3536d8f58477724ce7110d",
       "-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:723\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:248\", @@@",
       "@@@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 c5541e872..a56010af7 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/${platform} git_revision:723fc1a6c8cdf2631a57851f5610e598db0c1de1",
+      "infra/tools/mac_toolchain/${platform} git_revision:248bbfc433c8e2fc4e3536d8f58477724ce7110d",
       "-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:723\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:248\", @@@",
       "@@@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 7b89e2204..bb9c2ad6f 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/${platform} git_revision:723fc1a6c8cdf2631a57851f5610e598db0c1de1",
+      "infra/tools/mac_toolchain/${platform} git_revision:248bbfc433c8e2fc4e3536d8f58477724ce7110d",
       "-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:723\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-git_revision:248\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",