diff --git a/tools_webrtc/ios/internal.client.webrtc/iOS64_Debug.json b/tools_webrtc/ios/internal.client.webrtc/iOS64_Debug.json
index 1531f86bb5..60d916d476 100644
--- a/tools_webrtc/ios/internal.client.webrtc/iOS64_Debug.json
+++ b/tools_webrtc/ios/internal.client.webrtc/iOS64_Debug.json
@@ -25,11 +25,7 @@
       "os": "10.3.3",
       "dimensions": [
         {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13.3",
+          "os": "Mac",
           "pool": "Chrome"
         }
       ]
diff --git a/tools_webrtc/ios/internal.client.webrtc/iOS64_Perf.json b/tools_webrtc/ios/internal.client.webrtc/iOS64_Perf.json
index 482ccf19a2..58383fae4a 100644
--- a/tools_webrtc/ios/internal.client.webrtc/iOS64_Perf.json
+++ b/tools_webrtc/ios/internal.client.webrtc/iOS64_Perf.json
@@ -25,11 +25,7 @@
       "os": "11.0.3",
       "dimensions": [
         {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13",
+          "os": "Mac",
           "pool": "Chrome"
         }
       ]
diff --git a/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json b/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json
index 8e5db4deef..a894dba9a3 100644
--- a/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json
+++ b/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json
@@ -26,11 +26,7 @@
       "os": "10.3.3",
       "dimensions": [
         {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13.3",
+          "os": "Mac",
           "pool": "Chrome"
         }
       ]
diff --git a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_dbg.json b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_dbg.json
index 1531f86bb5..60d916d476 100644
--- a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_dbg.json
+++ b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_dbg.json
@@ -25,11 +25,7 @@
       "os": "10.3.3",
       "dimensions": [
         {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13.3",
+          "os": "Mac",
           "pool": "Chrome"
         }
       ]
diff --git a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_perf.json b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_perf.json
index 45e86eba3e..566876949e 100644
--- a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_perf.json
+++ b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_perf.json
@@ -25,11 +25,7 @@
       "os": "11.0.3",
       "dimensions": [
         {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13",
+          "os": "Mac",
           "pool": "Chrome"
         }
       ]
diff --git a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json
index 8e5db4deef..a894dba9a3 100644
--- a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json
+++ b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json
@@ -26,11 +26,7 @@
       "os": "10.3.3",
       "dimensions": [
         {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13.3",
+          "os": "Mac",
           "pool": "Chrome"
         }
       ]