diff --git a/.github/workflows/engine-nightly.yml b/.github/workflows/engine-nightly.yml
index bf58c73dc75e..7922206f64b1 100644
--- a/.github/workflows/engine-nightly.yml
+++ b/.github/workflows/engine-nightly.yml
@@ -107,7 +107,7 @@ jobs:
   enso-build-ci-gen-job-ci-check-backend-graal-vm-ce-macos-amd64:
     name: Engine (GraalVM CE) (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -354,7 +354,7 @@ jobs:
   enso-build-ci-gen-job-jvm-tests-graal-vm-ce-macos-amd64:
     name: JVM Tests (GraalVM CE) (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -640,7 +640,7 @@ jobs:
   enso-build-ci-gen-job-standard-library-tests-graal-vm-ce-macos-amd64:
     name: Standard Library Tests (GraalVM CE) (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
diff --git a/.github/workflows/enso4igv.yml b/.github/workflows/enso4igv.yml
index ecd7395b2c00..0437224a1360 100644
--- a/.github/workflows/enso4igv.yml
+++ b/.github/workflows/enso4igv.yml
@@ -39,7 +39,7 @@ jobs:
             target/lib/**
 
   build_mac_intel_parser:
-    runs-on: macos-12
+    runs-on: macos-13
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/gui.yml b/.github/workflows/gui.yml
index 88dea539e78c..ddc0974c8b37 100644
--- a/.github/workflows/gui.yml
+++ b/.github/workflows/gui.yml
@@ -61,7 +61,7 @@ jobs:
   enso-build-ci-gen-job-build-backend-macos-amd64:
     name: Build Backend (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -213,7 +213,7 @@ jobs:
   enso-build-ci-gen-job-gui-build-macos-amd64:
     name: GUI build (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -391,7 +391,7 @@ jobs:
     needs:
       - enso-build-ci-gen-job-build-backend-macos-amd64
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3b8c8e2078c7..80f1edb167eb 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -202,7 +202,7 @@ jobs:
     needs:
       - enso-build-ci-gen-draft-release-linux-amd64
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -484,7 +484,7 @@ jobs:
       - enso-build-ci-gen-draft-release-linux-amd64
       - enso-build-ci-gen-job-upload-backend-macos-amd64
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
diff --git a/.github/workflows/scala-new.yml b/.github/workflows/scala-new.yml
index d0694d9c1ad4..443be86de946 100644
--- a/.github/workflows/scala-new.yml
+++ b/.github/workflows/scala-new.yml
@@ -75,7 +75,7 @@ jobs:
   enso-build-ci-gen-job-ci-check-backend-graal-vm-ce-macos-amd64:
     name: Engine (GraalVM CE) (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -220,7 +220,7 @@ jobs:
   enso-build-ci-gen-job-jvm-tests-graal-vm-ce-macos-amd64:
     name: JVM Tests (GraalVM CE) (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
@@ -390,7 +390,7 @@ jobs:
   enso-build-ci-gen-job-standard-library-tests-graal-vm-ce-macos-amd64:
     name: Standard Library Tests (GraalVM CE) (macos, amd64)
     runs-on:
-      - macos-12
+      - macos-13
     steps:
       - if: startsWith(runner.name, 'GitHub Actions') || startsWith(runner.name, 'Hosted Agent')
         name: Installing wasm-pack
diff --git a/build/build/src/ci_gen/job.rs b/build/build/src/ci_gen/job.rs
index bf8d4f8f5b21..afbb9242a2e6 100644
--- a/build/build/src/ci_gen/job.rs
+++ b/build/build/src/ci_gen/job.rs
@@ -58,7 +58,6 @@ impl RunsOn for RunnerLabel {
             RunnerLabel::MacOS => Some("MacOS".to_string()),
             RunnerLabel::Linux => Some("Linux".to_string()),
             RunnerLabel::Windows => Some("Windows".to_string()),
-            RunnerLabel::MacOS12 => Some("MacOS12".to_string()),
             RunnerLabel::MacOS13 => Some("MacOS13".to_string()),
             RunnerLabel::MacOSLatest => Some("MacOSLatest".to_string()),
             RunnerLabel::LinuxLatest => Some("LinuxLatest".to_string()),
@@ -87,7 +86,7 @@ impl RunsOn for OS {
 impl RunsOn for (OS, Arch) {
     fn runs_on(&self) -> Vec<RunnerLabel> {
         match self {
-            (OS::MacOS, Arch::X86_64) => vec![RunnerLabel::MacOS12],
+            (OS::MacOS, Arch::X86_64) => vec![RunnerLabel::MacOS13],
             (os, Arch::X86_64) => runs_on(*os, RunnerType::SelfHosted),
             (OS::MacOS, Arch::AArch64) => {
                 let mut ret = runs_on(OS::MacOS, RunnerType::SelfHosted);
diff --git a/build/ci_utils/src/actions/workflow/definition.rs b/build/ci_utils/src/actions/workflow/definition.rs
index a9d3e0cc54c7..ede82b57ebc9 100644
--- a/build/ci_utils/src/actions/workflow/definition.rs
+++ b/build/ci_utils/src/actions/workflow/definition.rs
@@ -1014,9 +1014,6 @@ pub enum RunnerLabel {
     Windows,
     #[serde(rename = "engine")]
     Engine,
-    #[serde(rename = "macos-12")]
-    MacOS12,
-    /// macos-13 is the last x64 version of the GitHub-hosted macOS runner.
     #[serde(rename = "macos-13")]
     MacOS13,
     #[serde(rename = "macos-latest")]