diff --git a/.ci.yaml b/.ci.yaml
index f4647171d90..93f15444e6f 100644
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -157,7 +157,7 @@ platform_properties:
         [
           {"dependency": "apple_signing", "version": "version:to_2025"}
         ]
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       device_type: none
       $flutter/osx_sdk : >-
         {
@@ -174,7 +174,7 @@ platform_properties:
         [
           {"dependency": "apple_signing", "version": "version:to_2025"}
         ]
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       device_type: none
       cpu: arm64
       $flutter/osx_sdk : >-
@@ -194,7 +194,7 @@ platform_properties:
         ]
       device_type: none
       mac_model: "Macmini8,1"
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       tags: >
         ["devicelab", "hostonly", "mac"]
       $flutter/osx_sdk : >-
@@ -212,7 +212,7 @@ platform_properties:
         [
           {"dependency": "apple_signing", "version": "version:to_2025"}
         ]
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       device_type: none
       cpu: x86
       $flutter/osx_sdk : >-
@@ -231,7 +231,7 @@ platform_properties:
           {"dependency": "ruby", "version": "ruby_3.1-pod_1.13"},
           {"dependency": "apple_signing", "version": "version:to_2025"}
         ]
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       device_type: none
       cpu: x86
       $flutter/osx_sdk : >-
@@ -247,7 +247,7 @@ platform_properties:
           {"dependency": "chrome_and_driver", "version": "version:125.0.6422.141"},
           {"dependency": "open_jdk", "version": "version:21"}
         ]
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       cpu: x86
       device_type: "mokey"
 
@@ -258,7 +258,7 @@ platform_properties:
           {"dependency": "android_sdk", "version": "version:36v1"},
           {"dependency": "open_jdk", "version": "version:21"}
         ]
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       cpu: arm64
       device_type: "mokey"
 
@@ -273,7 +273,7 @@ platform_properties:
           {"dependency": "ruby", "version": "ruby_3.1-pod_1.13"},
           {"dependency": "apple_signing", "version": "version:to_2025"}
         ]
-      os: Mac-14|Mac-15.1|Mac-15.5
+      os: Mac-14|Mac-15
       device_os: iOS-17|iOS-18
       $flutter/osx_sdk : >-
         {
@@ -291,7 +291,7 @@ platform_properties:
           {"dependency": "ruby", "version": "ruby_3.1-pod_1.13"},
           {"dependency": "apple_signing", "version": "version:to_2025"}
         ]
-      os: Mac-14|Mac-15.1|Mac-15.5
+      os: Mac-14|Mac-15
       cpu: x86
       device_os: iOS-17|iOS-18
       $flutter/osx_sdk : >-
@@ -310,7 +310,7 @@ platform_properties:
           {"dependency": "ruby", "version": "ruby_3.1-pod_1.13"},
           {"dependency": "apple_signing", "version": "none"}
         ]
-      os: Mac-14|Mac-15.1|Mac-15.5
+      os: Mac-14|Mac-15
       cpu: arm64
       device_os: iOS-17|iOS-18
       $flutter/osx_sdk : >-
@@ -5525,7 +5525,7 @@ targets:
         ["devicelab", "ios", "mac"]
       task_name: flutter_gallery__transition_perf_e2e_ios
       drone_dimensions: >
-        ["device_os=iOS-17|iOS-18","os=Mac-14|Mac-15.5", "cpu=x86"]
+        ["device_os=iOS-17|iOS-18","os=Mac-14|Mac-15", "cpu=x86"]
 
   - name: Mac_ios animated_blur_backdrop_filter_perf_ios__timeline_summary
     recipe: devicelab/devicelab_drone
diff --git a/engine/src/flutter/.ci.yaml b/engine/src/flutter/.ci.yaml
index 036a93f8221..9e530b0c57c 100644
--- a/engine/src/flutter/.ci.yaml
+++ b/engine/src/flutter/.ci.yaml
@@ -30,7 +30,7 @@ platform_properties:
           {"dependency": "open_jdk", "version": "version:17"}
         ]
       device_type: none
-      os: Mac-14|Mac-15.5
+      os: Mac-14|Mac-15
       $flutter/osx_sdk : >-
         {
           "sdk_version": "16c5032a"
@@ -450,7 +450,7 @@ targets:
     # Do not remove(https://github.com/flutter/flutter/issues/144644)
     # Scheduler will fail to get the platform
     drone_dimensions:
-      - os=Mac-14|Mac-15.5
+      - os=Mac-14|Mac-15
 
   - name: Mac clangd
     recipe: engine_v2/builder
@@ -479,7 +479,7 @@ targets:
     # Do not remove(https://github.com/flutter/flutter/issues/144644)
     # Scheduler will fail to get the platform
     drone_dimensions:
-      - os=Mac-14|Mac-15.5
+      - os=Mac-14|Mac-15
       - cpu=x86
 
   - name: Mac mac_ios_engine_ddm
@@ -500,7 +500,7 @@ targets:
     # Do not remove(https://github.com/flutter/flutter/issues/144644)
     # Scheduler will fail to get the platform
     drone_dimensions:
-      - os=Mac-14|Mac-15.5
+      - os=Mac-14|Mac-15
       - cpu=x86
 
   - name: Linux windows_android_aot_engine
diff --git a/engine/src/flutter/ci/builders/linux_web_engine_test.json b/engine/src/flutter/ci/builders/linux_web_engine_test.json
index 172fdb529ff..57d464dbf6a 100644
--- a/engine/src/flutter/ci/builders/linux_web_engine_test.json
+++ b/engine/src/flutter/ci/builders/linux_web_engine_test.json
@@ -397,7 +397,7 @@
       "recipe": "engine_v2/tester_engine",
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "cpu=arm64"
       ],
       "gclient_variables": {
diff --git a/engine/src/flutter/ci/builders/local_engine.json b/engine/src/flutter/ci/builders/local_engine.json
index 0c6fcfda699..eb13020cff6 100644
--- a/engine/src/flutter/ci/builders/local_engine.json
+++ b/engine/src/flutter/ci/builders/local_engine.json
@@ -3,7 +3,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -36,7 +36,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -70,7 +70,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -103,7 +103,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -136,7 +136,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -170,7 +170,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -206,7 +206,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -344,7 +344,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -377,7 +377,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -410,7 +410,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -494,7 +494,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -578,7 +578,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -610,7 +610,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -643,7 +643,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -676,7 +676,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -815,7 +815,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -899,7 +899,7 @@
     {
       "cas_archive": false,
       "drone_dimensions": [
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "device_type=none"
       ],
       "gclient_variables": {
@@ -1037,7 +1037,7 @@
       "name": "macos/wasm_release",
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5"
+        "os=Mac-14|Mac-15"
       ],
       "gclient_variables": {
         "download_android_deps": false,
@@ -1067,7 +1067,7 @@
       "name": "macos/wasm_debug_unopt",
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5"
+        "os=Mac-14|Mac-15"
       ],
       "gclient_variables": {
         "download_android_deps": false,
diff --git a/engine/src/flutter/ci/builders/mac_android_aot_engine.json b/engine/src/flutter/ci/builders/mac_android_aot_engine.json
index 1cc6c8960f1..57f61d4c0b1 100644
--- a/engine/src/flutter/ci/builders/mac_android_aot_engine.json
+++ b/engine/src/flutter/ci/builders/mac_android_aot_engine.json
@@ -25,7 +25,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -83,7 +83,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -143,7 +143,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -203,7 +203,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -261,7 +261,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -321,7 +321,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
diff --git a/engine/src/flutter/ci/builders/mac_clang_tidy.json b/engine/src/flutter/ci/builders/mac_clang_tidy.json
index b3928b3dc35..9b18f6a04ca 100644
--- a/engine/src/flutter/ci/builders/mac_clang_tidy.json
+++ b/engine/src/flutter/ci/builders/mac_clang_tidy.json
@@ -3,7 +3,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -36,7 +36,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -74,7 +74,7 @@
             "recipe": "engine_v2/tester_engine",
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -129,7 +129,7 @@
             "recipe": "engine_v2/tester_engine",
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -184,7 +184,7 @@
             "recipe": "engine_v2/tester_engine",
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -239,7 +239,7 @@
             "recipe": "engine_v2/tester_engine",
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -294,7 +294,7 @@
             "recipe": "engine_v2/tester_engine",
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
diff --git a/engine/src/flutter/ci/builders/mac_host_engine.json b/engine/src/flutter/ci/builders/mac_host_engine.json
index 654b5d96b09..db715f15a3c 100644
--- a/engine/src/flutter/ci/builders/mac_host_engine.json
+++ b/engine/src/flutter/ci/builders/mac_host_engine.json
@@ -19,7 +19,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -86,7 +86,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -142,7 +142,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -207,7 +207,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -258,7 +258,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -309,7 +309,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -372,7 +372,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -426,7 +426,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -479,7 +479,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -545,7 +545,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -602,7 +602,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -658,7 +658,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -724,7 +724,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -779,7 +779,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -834,7 +834,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -901,7 +901,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -959,7 +959,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -1016,7 +1016,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
diff --git a/engine/src/flutter/ci/builders/mac_ios_engine.json b/engine/src/flutter/ci/builders/mac_ios_engine.json
index 74d65d4e927..5573abca642 100644
--- a/engine/src/flutter/ci/builders/mac_ios_engine.json
+++ b/engine/src/flutter/ci/builders/mac_ios_engine.json
@@ -16,7 +16,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -63,7 +63,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -112,7 +112,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -159,7 +159,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -206,7 +206,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -253,7 +253,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -302,7 +302,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -353,7 +353,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -402,7 +402,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -451,7 +451,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
diff --git a/engine/src/flutter/ci/builders/mac_ios_engine_ddm.json b/engine/src/flutter/ci/builders/mac_ios_engine_ddm.json
index 8d6b5c8f260..a76c23f3c89 100644
--- a/engine/src/flutter/ci/builders/mac_ios_engine_ddm.json
+++ b/engine/src/flutter/ci/builders/mac_ios_engine_ddm.json
@@ -16,7 +16,7 @@
     {
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "cpu=arm64"
       ],
       "gclient_variables": {
@@ -65,7 +65,7 @@
     {
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "cpu=arm64"
       ],
       "gclient_variables": {
@@ -116,7 +116,7 @@
     {
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "cpu=arm64"
       ],
       "gclient_variables": {
@@ -165,7 +165,7 @@
     {
       "drone_dimensions": [
         "device_type=none",
-        "os=Mac-14|Mac-15.5",
+        "os=Mac-14|Mac-15",
         "cpu=arm64"
       ],
       "gclient_variables": {
diff --git a/engine/src/flutter/ci/builders/mac_unopt.json b/engine/src/flutter/ci/builders/mac_unopt.json
index 9a31ed87f1b..3d86f83c40f 100644
--- a/engine/src/flutter/ci/builders/mac_unopt.json
+++ b/engine/src/flutter/ci/builders/mac_unopt.json
@@ -4,7 +4,7 @@
             "cas_archive": false,
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -57,7 +57,7 @@
             "cas_archive": false,
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -108,7 +108,7 @@
             "cas_archive": false,
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -159,7 +159,7 @@
             "cas_archive": false,
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -216,7 +216,7 @@
             ],
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -275,7 +275,7 @@
             },
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=x86"
             ],
             "gclient_variables": {
@@ -332,7 +332,7 @@
             "cas_archive": false,
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -400,7 +400,7 @@
             },
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
@@ -468,7 +468,7 @@
             },
             "drone_dimensions": [
                 "device_type=none",
-                "os=Mac-14|Mac-15.5",
+                "os=Mac-14|Mac-15",
                 "cpu=arm64"
             ],
             "gclient_variables": {
diff --git a/engine/src/flutter/lib/web_ui/dev/generate_builder_json.dart b/engine/src/flutter/lib/web_ui/dev/generate_builder_json.dart
index 99feeed22c2..d97bdc9f966 100644
--- a/engine/src/flutter/lib/web_ui/dev/generate_builder_json.dart
+++ b/engine/src/flutter/lib/web_ui/dev/generate_builder_json.dart
@@ -100,7 +100,7 @@ class GenerateBuilderJsonCommand extends Command<bool> {
         packageLock,
         'Mac',
         BrowserName.safari,
-        specificOS: 'Mac-14|Mac-15.5',
+        specificOS: 'Mac-14|Mac-15',
         cpu: 'arm64',
       ),
     ];