Replace macos-latest with macos-11

GitHub are rolling out macos 12 for the -latest image
(actions/runner-images#6384), but we need to
continue to support and build for macos 11.

Fixes #11152

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ on:
         type: string
       smoke-test-platforms:
         required: false
-        default: windows-latest macos-latest
+        default: windows-latest macos-11
         description: Platforms on which to run integration tests, as a space delimited list
         type: string
       enable-coverage:
@@ -115,8 +115,8 @@ jobs:
               { "os": "linux",   "arch": "arm64", "build-platform": "ubuntu-latest" },
               { "os": "windows", "arch": "amd64", "build-platform": "ubuntu-latest" },
               { "os": "windows", "arch": "arm64", "build-platform": "ubuntu-latest" },
-              { "os": "darwin",  "arch": "amd64", "build-platform": "macos-latest" },
-              { "os": "darwin",  "arch": "arm64", "build-platform": "macos-latest" }
+              { "os": "darwin",  "arch": "amd64", "build-platform": "macos-11" },
+              { "os": "darwin",  "arch": "arm64", "build-platform": "macos-11" }
             ]'
           fi
 
@@ -236,10 +236,10 @@ jobs:
   unit-test:
     # By putting a variable in the name, we remove GitHub's auto-generated matrix parameters from
     # appearing in the rendered title of the job name: It changes this:
-    #   CI / Unit Test (cd sdk/dotnet && make dotnet_test, cd sdk/dotnet && make dotnet_test, macos-latest, mi... / sdk/dotnet dotnet_test on macos-latest/current
+    #   CI / Unit Test (cd sdk/dotnet && make dotnet_test, cd sdk/dotnet && make dotnet_test, macos-11, mi... / sdk/dotnet dotnet_test on macos-11/current
     #   (See: https://github.com/pulumi/pulumi/runs/8241055084?check_suite_focus=true#logs)
     # To this:
-    #   CI / Unit Test / sdk/dotnet dotnet_test on macos-latest/current
+    #   CI / Unit Test / sdk/dotnet dotnet_test on macos-11/current
     name: Unit Test${{ matrix.platform && '' }}
     needs: [matrix]
     if: ${{ needs.matrix.outputs.unit-test-matrix != '{}' }}

.github/workflows/download-pulumi-cron.yml

@@ -11,7 +11,7 @@ defaults:
 jobs:
   macos-homebrew-install:
     name: Install Pulumi with Homebrew on macOS
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - name: homedate homebrew formulae
         run: brew update
@@ -29,7 +29,7 @@ jobs:
           exit 1
   macOS-direct-install:
     name: Install Pulumi via script on macOS
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - run: curl -fsSL https://get.pulumi.com | sh
       - run: echo "/Users/runner/.pulumi/bin" >> "${GITHUB_PATH}"
@@ -46,7 +46,7 @@ jobs:
           exit 1
   macos-verify-download-link:
     name: Verify Direct Download link on macOS
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - name: Direct Download
         run: curl -L -o pulumi.tar.gz "https://get.pulumi.com/releases/sdk/pulumi-v$(curl -sS https://www.pulumi.com/latest-version)-darwin-x64.tar.gz"
@@ -167,7 +167,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
+        os: ["ubuntu-latest", "windows-latest", "macos-11"]
     steps:
       - name: Install Pulumi CLI
         uses: pulumi/action-install-pulumi-cli@v1.0.1

.github/workflows/on-pr.yml

@@ -57,7 +57,7 @@ jobs:
       smoke-test-platforms: >- # No newlines or trailing newline.
         ${{
           contains(github.event.pull_request.labels.*.name, 'ci/test')
-          && 'macos-latest windows-latest'
+          && 'macos-11 windows-latest'
           || ''
         }}
       enable-coverage: true

changelog/pending/20221026--build--fix-release-build-to-continue-to-use-macos-11.yaml

@@ -0,0 +1,4 @@
+changes:
+- type: fix
+  scope: build
+  description: Fix release build to continue to use MacOS 11.

scripts/get-job-matrix.py

@@ -90,7 +90,7 @@ class MakefileTest(TypedDict):
     {"name": "sdk/nodejs sxs_tests", "run": "cd sdk/nodejs && ../../scripts/retry make sxs_tests", "eta": 3},
 ]
 
-ALL_PLATFORMS = ["ubuntu-latest", "windows-latest", "macos-latest"]
+ALL_PLATFORMS = ["ubuntu-latest", "windows-latest", "macos-11"]
 
 
 MINIMUM_SUPPORTED_VERSION_SET = {