diff --git a/.github/workflows/clp-core-build-macos.yaml b/.github/workflows/clp-core-build-macos.yaml
index 51eb6985d0..ebf567cdb7 100644
--- a/.github/workflows/clp-core-build-macos.yaml
+++ b/.github/workflows/clp-core-build-macos.yaml
@@ -45,8 +45,6 @@ jobs:
     strategy:
       matrix:
         os:
-          - "macos-13"
-          - "macos-14"
           - "macos-15"
         use_shared_libs:
           - true
diff --git a/.github/workflows/clp-core-build.yaml b/.github/workflows/clp-core-build.yaml
index ad0ea8fbf2..93292ed311 100644
--- a/.github/workflows/clp-core-build.yaml
+++ b/.github/workflows/clp-core-build.yaml
@@ -42,7 +42,7 @@ concurrency:
 jobs:
   filter-relevant-changes:
     name: "filter-relevant-changes"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     outputs:
       centos_stream_9_image_changed: "${{steps.filter.outputs.centos_stream_9_image}}"
       ubuntu_jammy_image_changed: "${{steps.filter.outputs.ubuntu_jammy_image}}"
@@ -99,7 +99,7 @@ jobs:
     name: "centos-stream-9-deps-image"
     if: "needs.filter-relevant-changes.outputs.centos_stream_9_image_changed == 'true'"
     needs: "filter-relevant-changes"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
@@ -125,7 +125,7 @@ jobs:
     name: "ubuntu-jammy-deps-image"
     if: "needs.filter-relevant-changes.outputs.ubuntu_jammy_image_changed == 'true'"
     needs: "filter-relevant-changes"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
@@ -160,7 +160,7 @@ jobs:
         use_shared_libs: [true, false]
     name: "centos-stream-9-${{matrix.use_shared_libs == true && 'dynamic' || 'static'}}-linked-bins"
     continue-on-error: true
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
@@ -205,7 +205,7 @@ jobs:
       OS_NAME: "ubuntu-jammy"
     name: "ubuntu-jammy-${{matrix.use_shared_libs == true && 'dynamic' || 'static'}}-linked-bins"
     continue-on-error: true
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
@@ -252,7 +252,7 @@ jobs:
     # Run if the ancestor jobs were successful/skipped and building clp was successful.
     if: "!cancelled() && !failure() && needs.ubuntu-jammy-binaries.result == 'success'"
     needs: "ubuntu-jammy-binaries"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     env:
       OS_NAME: "ubuntu-jammy"
       TMP_OUTPUT_DIR: "/tmp"
@@ -319,7 +319,7 @@ jobs:
     needs:
       - "filter-relevant-changes"
       - "ubuntu-jammy-deps-image"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
diff --git a/.github/workflows/clp-docs.yaml b/.github/workflows/clp-docs.yaml
index 82fc4a0e90..7507979d44 100644
--- a/.github/workflows/clp-docs.yaml
+++ b/.github/workflows/clp-docs.yaml
@@ -18,7 +18,9 @@ jobs:
     name: "build"
     strategy:
       matrix:
-        os: ["macos-latest", "ubuntu-latest"]
+        os:
+          - "macos-15"
+          - "ubuntu-24.04"
     runs-on: "${{matrix.os}}"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
@@ -34,7 +36,7 @@ jobs:
         shell: "bash"
         run: "npm install -g @go-task/cli"
 
-      - if: "matrix.os == 'macos-latest'"
+      - if: "matrix.os == 'macos-15'"
         name: "Install coreutils (for md5sum)"
         run: "brew install coreutils"
 
@@ -46,7 +48,7 @@ jobs:
       - if: >-
           contains(fromJSON('["push", "workflow_dispatch"]'), github.event_name)
           && ('refs/heads/main' == github.ref || startsWith(github.ref, 'refs/tags/v'))
-          && 'ubuntu-latest' == matrix.os
+          && 'ubuntu-24.04' == matrix.os
         uses: "actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02"
         with:
           name: "docs-html"
diff --git a/.github/workflows/clp-execution-image-build.yaml b/.github/workflows/clp-execution-image-build.yaml
index 17789906e8..c2af595c0f 100644
--- a/.github/workflows/clp-execution-image-build.yaml
+++ b/.github/workflows/clp-execution-image-build.yaml
@@ -24,7 +24,7 @@ concurrency:
 jobs:
   filter-relevant-changes:
     name: "filter-relevant-changes"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     outputs:
       ubuntu_jammy_image_changed: "${{steps.filter.outputs.ubuntu_jammy_image}}"
     steps:
@@ -51,7 +51,7 @@ jobs:
     name: "ubuntu-jammy-execution-image"
     if: "'true' == needs.filter-relevant-changes.outputs.ubuntu_jammy_image_changed"
     needs: "filter-relevant-changes"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
diff --git a/.github/workflows/clp-lint.yaml b/.github/workflows/clp-lint.yaml
index 5f800d8c23..ba5eed50e6 100644
--- a/.github/workflows/clp-lint.yaml
+++ b/.github/workflows/clp-lint.yaml
@@ -18,7 +18,9 @@ jobs:
     name: "lint-check"
     strategy:
       matrix:
-        os: ["macos-latest", "ubuntu-latest"]
+        os:
+          - "macos-15"
+          - "ubuntu-24.04"
     runs-on: "${{matrix.os}}"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
@@ -33,7 +35,7 @@ jobs:
         shell: "bash"
         run: "npm install -g @go-task/cli"
 
-      - if: "matrix.os == 'macos-latest'"
+      - if: "matrix.os == 'macos-15'"
         name: "Install coreutils (for md5sum)"
         run: "brew install coreutils"
 
diff --git a/.github/workflows/clp-pr-title-checks.yaml b/.github/workflows/clp-pr-title-checks.yaml
index 0aa1533a98..6aed037a92 100644
--- a/.github/workflows/clp-pr-title-checks.yaml
+++ b/.github/workflows/clp-pr-title-checks.yaml
@@ -24,7 +24,7 @@ jobs:
     permissions:
       # For amannn/action-semantic-pull-request
       pull-requests: "read"
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-24.04"
     steps:
       - uses: "amannn/action-semantic-pull-request@0723387faaf9b38adef4775cd42cfd5155ed6017"
         env:
diff --git a/.github/workflows/clp-s-generated-code-checks.yaml b/.github/workflows/clp-s-generated-code-checks.yaml
index e605db9005..887afa6b5d 100644
--- a/.github/workflows/clp-s-generated-code-checks.yaml
+++ b/.github/workflows/clp-s-generated-code-checks.yaml
@@ -15,7 +15,9 @@ jobs:
     name: "antlr-code-committed"
     strategy:
       matrix:
-        os: ["macos-latest", "ubuntu-latest"]
+        os:
+          - "macos-15"
+          - "ubuntu-24.04"
     runs-on: "${{matrix.os}}"
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
@@ -26,7 +28,7 @@ jobs:
         shell: "bash"
         run: "npm install -g @go-task/cli"
 
-      - if: "matrix.os == 'macos-latest'"
+      - if: "matrix.os == 'macos-15'"
         name: "Install coreutils (for md5sum)"
         run: "brew install coreutils"