diff --git a/eng/pipelines/templates/jobs/run-cli-tests.yml b/eng/pipelines/templates/jobs/run-cli-tests.yml
index c3de648896d4..376bb9bb0086 100644
--- a/eng/pipelines/templates/jobs/run-cli-tests.yml
+++ b/eng/pipelines/templates/jobs/run-cli-tests.yml
@@ -40,7 +40,7 @@ jobs:
         #   imageName: 'windows-2019'
         #   poolName: 'azsdk-pool-mms-win-2019-general'
         # mac:
-        #   imageName: 'macOS-10.15'
+        #   imageName: 'macos-11'
         #   poolName: 'Azure Pipelines'
 
     pool:
diff --git a/eng/pipelines/templates/jobs/smoke.tests.yml b/eng/pipelines/templates/jobs/smoke.tests.yml
index 95a0e157ff86..4c22e4ce5183 100644
--- a/eng/pipelines/templates/jobs/smoke.tests.yml
+++ b/eng/pipelines/templates/jobs/smoke.tests.yml
@@ -82,13 +82,13 @@ jobs:
           Python_37_Mac (AzureCloud):
             PythonVersion: '3.7'
             Pool: Azure Pipelines
-            OSVmImage: macOS-10.15
+            OSVmImage: macos-11
             SubscriptionConfiguration: $(sub-config-azure-cloud-test-resources)
             ArmTemplateParameters: $(azureCloudArmParameters)
           Python_38_Mac (AzureCloud):
             PythonVersion: '3.8'
             Pool: Azure Pipelines
-            OSVmImage: macOS-10.15
+            OSVmImage: macos-11
             SubscriptionConfiguration: $(sub-config-azure-cloud-test-resources)
             ArmTemplateParameters: $(azureCloudArmParameters)
           Python_38_Linux (AzureUSGovernment):
diff --git a/eng/pipelines/templates/stages/platform-matrix-cryptography-dependency.json b/eng/pipelines/templates/stages/platform-matrix-cryptography-dependency.json
index ee94f3bdeb9b..f7183c706bed 100644
--- a/eng/pipelines/templates/stages/platform-matrix-cryptography-dependency.json
+++ b/eng/pipelines/templates/stages/platform-matrix-cryptography-dependency.json
@@ -5,7 +5,7 @@
   "matrix": {
     "Agent": {
       "ubuntu-20.04": { "OSVmImage": "MMSUbuntu20.04", "Pool": "azsdk-pool-mms-ubuntu-2004-general" },
-      "macOS-10.15": { "OSVmImage": "macOS-10.15", "Pool": "Azure Pipelines" }
+      "macos-11": { "OSVmImage": "macos-11", "Pool": "Azure Pipelines" }
     },
     "PythonVersion": [ "pypy3.7", "3.8"],
     "CoverageArg": "--disablecov"
@@ -24,7 +24,7 @@
     },
     {
       "Agent": {
-        "macOS-10.15": { "OSVmImage": "macOS-10.15", "Pool": "Azure Pipelines" }
+        "macos-11": { "OSVmImage": "macos-11", "Pool": "Azure Pipelines" }
       },
       "PythonVersion": "3.7",
       "CoverageArg": "--disablecov"
diff --git a/eng/pipelines/templates/stages/platform-matrix.json b/eng/pipelines/templates/stages/platform-matrix.json
index b3aadb177ed0..340552e70001 100644
--- a/eng/pipelines/templates/stages/platform-matrix.json
+++ b/eng/pipelines/templates/stages/platform-matrix.json
@@ -8,7 +8,7 @@
     "Agent": {
       "ubuntu-20.04": { "OSVmImage": "MMSUbuntu20.04", "Pool": "azsdk-pool-mms-ubuntu-2004-general" },
       "windows-2019": { "OSVmImage": "MMS2019", "Pool": "azsdk-pool-mms-win-2019-general" },
-      "macOS-10.15": { "OSVmImage": "macOS-10.15", "Pool": "Azure Pipelines" }
+      "macos-11": { "OSVmImage": "macos-11", "Pool": "Azure Pipelines" }
     },
     "PythonVersion": [ "pypy3.7", "3.7", "3.8" ],
     "CoverageArg": "--disablecov",
diff --git a/eng/scripts/job-matrix/job-matrix-functions.filter.tests.ps1 b/eng/scripts/job-matrix/job-matrix-functions.filter.tests.ps1
index 52ab626166d0..8ca2c6c1d5b5 100644
--- a/eng/scripts/job-matrix/job-matrix-functions.filter.tests.ps1
+++ b/eng/scripts/job-matrix/job-matrix-functions.filter.tests.ps1
@@ -6,7 +6,7 @@ BeforeAll {
     $matrixConfig = @"
 {
     "matrix": {
-        "operatingSystem": [ "windows-2019", "ubuntu-18.04", "macOS-10.15" ],
+        "operatingSystem": [ "windows-2019", "ubuntu-18.04", "macos-11" ],
         "framework": [ "net461", "netcoreapp2.1" ],
         "additionalArguments": [ "", "mode=test" ]
     }
diff --git a/eng/scripts/job-matrix/job-matrix-functions.tests.ps1 b/eng/scripts/job-matrix/job-matrix-functions.tests.ps1
index cc36fcd61680..8fd8fb7a66d8 100644
--- a/eng/scripts/job-matrix/job-matrix-functions.tests.ps1
+++ b/eng/scripts/job-matrix/job-matrix-functions.tests.ps1
@@ -12,7 +12,7 @@ BeforeAll {
         "operatingSystem": [
           "windows-2019",
           "ubuntu-18.04",
-          "macOS-10.15"
+          "macos-11"
         ],
         "framework": [
           "net461",
@@ -36,11 +36,11 @@ BeforeAll {
             "framework": "net461"
         },
         {
-            "operatingSystem": "macOS-10.15",
+            "operatingSystem": "macos-11",
             "framework": "netcoreapp2.1"
         },
         {
-            "operatingSystem": ["macOS-10.15", "ubuntu-18.04"],
+            "operatingSystem": ["macos-11", "ubuntu-18.04"],
             "additionalArguments": "--enableFoo"
         }
     ]
@@ -275,7 +275,7 @@ Describe "Platform Matrix Generation" -Tag "generate" {
         "operatingSystem": [
           "windows-2019",
           "ubuntu-18.04",
-          "macOS-10.15"
+          "macos-11"
         ],
         "framework": [
           "net461",
@@ -359,7 +359,7 @@ Describe "Platform Matrix Generation" -Tag "generate" {
         $element.parameters.additionalArguments | Should -Be "--enableFoo"
 
         $element = GetNdMatrixElement @(2, 1, 1) $matrix $dimensions
-        $element.parameters.operatingSystem | Should -Be "macOS-10.15"
+        $element.parameters.operatingSystem | Should -Be "macos-11"
         $element.parameters.framework | Should -Be "netcoreapp2.1"
         $element.parameters.additionalArguments | Should -Be "--enableFoo"
     }
@@ -367,7 +367,7 @@ Describe "Platform Matrix Generation" -Tag "generate" {
     It "Should initialize a sparse matrix from an N-dimensional matrix" -TestCases @(
         @{ i = 0; name = "windows2019_net461"; operatingSystem = "windows-2019"; framework = "net461"; additionalArguments = ""; }
         @{ i = 1; name = "ubuntu1804_netcoreapp21_withfoo"; operatingSystem = "ubuntu-18.04"; framework = "netcoreapp2.1"; additionalArguments = "--enableFoo"; }
-        @{ i = 2; name = "macOS1015_net461"; operatingSystem = "macOS-10.15"; framework = "net461"; additionalArguments = ""; }
+        @{ i = 2; name = "macOS11_net461"; operatingSystem = "macos-11"; framework = "net461"; additionalArguments = ""; }
     ) {
         $sparseMatrix = GenerateSparseMatrix $generateConfig.orderedMatrix $generateConfig.displayNamesLookup
         $dimensions = GetMatrixDimensions $generateConfig.orderedMatrix
@@ -465,7 +465,7 @@ Describe "Platform Matrix Post Transformation" -Tag "transform" {
 
         $matrix[4].name | Should -Be "macOS1015_net461"
         $matrix[4].parameters.framework | Should -Be "net461"
-        $matrix[4].parameters.operatingSystem | Should -Be "macOS-10.15"
+        $matrix[4].parameters.operatingSystem | Should -Be "macos-11"
         $matrix[4].parameters.additionalArguments | Should -Be ""
 
         $matrix[7].name | Should -Be "windows2019_net50_enableWindowsFoo"
diff --git a/eng/scripts/job-matrix/samples/matrix.json b/eng/scripts/job-matrix/samples/matrix.json
index 10d67730f0ec..03d4b7aa13aa 100644
--- a/eng/scripts/job-matrix/samples/matrix.json
+++ b/eng/scripts/job-matrix/samples/matrix.json
@@ -6,7 +6,7 @@
     "operatingSystem": [
       "windows-2019",
       "ubuntu-18.04",
-      "macOS-10.15"
+      "macos-11"
     ],
     "framework": [
       "net461",
diff --git a/sdk/communication/azure-communication-phonenumbers/phonenumbers-livetest-matrix.json b/sdk/communication/azure-communication-phonenumbers/phonenumbers-livetest-matrix.json
index da3f760ea4cb..b05817346d4b 100644
--- a/sdk/communication/azure-communication-phonenumbers/phonenumbers-livetest-matrix.json
+++ b/sdk/communication/azure-communication-phonenumbers/phonenumbers-livetest-matrix.json
@@ -17,8 +17,8 @@
         "AZURE_TEST_AGENT": "WINDOWS_2019_PYTHON36",
         "COMMUNICATION_SKIP_CAPABILITIES_LIVE_TEST": "false"
       },
-      "macOS-10.15": {
-        "OSVmImage": "macOS-10.15",
+      "macos-11": {
+        "OSVmImage": "macos-11",
         "Pool": "Azure Pipelines",
         "AZURE_TEST_AGENT": "MACOS_1015_PYTHON37",
         "COMMUNICATION_SKIP_CAPABILITIES_LIVE_TEST": "false"
diff --git a/sdk/storage/platform-matrix-all-versions.json b/sdk/storage/platform-matrix-all-versions.json
index 70f7f1c0f458..37758ccf8822 100644
--- a/sdk/storage/platform-matrix-all-versions.json
+++ b/sdk/storage/platform-matrix-all-versions.json
@@ -8,7 +8,7 @@
         "Agent": {
           "ubuntu-18.04": { "OSVmImage": "MMSUbuntu20.04", "Pool": "azsdk-pool-mms-ubuntu-2004-general" },
           "windows-2019": { "OSVmImage": "MMS2019", "Pool": "azsdk-pool-mms-win-2019-general" },
-          "macOS-10.15": { "OSVmImage": "macOS-10.15", "Pool": "Azure Pipelines" }
+          "macos-11": { "OSVmImage": "macos-11", "Pool": "Azure Pipelines" }
         },
         "PythonVersion": [ "pypy3.7", "3.7", "3.8", "3.9" ],
         "CoverageArg": "--disablecov",