diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 4f15934c..2aa2ebeb 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -47,12 +47,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ${{ fromJson(github.repository_owner == 'subspace' && '[["self-hosted", "ubuntu-20.04-x86-64"], ["self-hosted", "macos-12-arm64"], ["self-hosted", "windows-server-2022-x86-64"]]' || '["ubuntu-20.04", "macos-12", "windows-2022"]') }}
+        os: ${{ fromJson(github.repository_owner == 'subspace' && '[["self-hosted", "ubuntu-20.04-x86-64"], ["self-hosted", "macos-14-arm64"], ["self-hosted", "windows-server-2022-x86-64"]]' || '["ubuntu-20.04", "macos-14", "windows-2022"]') }}
         run-all:
           - ${{ inputs.test-macos-and-windows == true || github.ref == 'refs/heads/main' }}
-        exclude: # exclude macos-12 and windows-2022 when the condition is false
+        exclude: # exclude macos-14 and windows-2022 when the condition is false
           - run-all: false
-            os: macos-12
+            os: macos-14
           - run-all: false
             os: windows-2022
 
@@ -117,12 +117,12 @@ jobs:
   test:
     strategy:
       matrix:
-        os: ${{ fromJson(github.repository_owner == 'subspace' && '[["self-hosted", "ubuntu-20.04-x86-64"], ["self-hosted", "macos-12-arm64"], ["self-hosted", "windows-server-2022-x86-64"]]' || '["ubuntu-20.04", "macos-12", "windows-2022"]') }}
+        os: ${{ fromJson(github.repository_owner == 'subspace' && '[["self-hosted", "ubuntu-20.04-x86-64"], ["self-hosted", "macos-14-arm64"], ["self-hosted", "windows-server-2022-x86-64"]]' || '["ubuntu-20.04", "macos-14", "windows-2022"]') }}
         run-all:
           - ${{ inputs.test-macos-and-windows || github.ref == 'refs/heads/master' }}
-        exclude: # exclude macos-12 and window-2022 when the condition is false
+        exclude: # exclude macos-14 and window-2022 when the condition is false
           - run-all: false
-            os: macos-12
+            os: macos-14
           - run-all: false
             os: windows-2022
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b4cc48dc..be860265 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -34,14 +34,14 @@ jobs:
             # TODO: AES flag is such that we have decent performance on ARMv8, remove once `aes` crate bumps MSRV to
             #  at least 1.61: https://github.com/RustCrypto/block-ciphers/issues/373
             rustflags: "-C linker=aarch64-linux-gnu-gcc --cfg aes_armv8"
-          - os: ${{ fromJson(github.repository_owner == 'subspace' && '["self-hosted", "macos-12-arm64"]' || '"macos-12"') }}
+          - os: ${{ fromJson(github.repository_owner == 'subspace' && '["self-hosted", "macos-14-arm64"]' || '"macos-14"') }}
             target: aarch64-apple-darwin
             production_target: target/aarch64-apple-darwin/production
             suffix: macos-aarch64-${{ github.ref_name }}
             # TODO: AES flag is such that we have decent performance on ARMv8, remove once `aes` crate bumps MSRV to
             #  at least 1.61: https://github.com/RustCrypto/block-ciphers/issues/373
             rustflags: "--cfg aes_armv8"
-          - os: ${{ fromJson(github.repository_owner == 'subspace' && '["self-hosted", "macos-12-arm64"]' || '"macos-12"') }}
+          - os: ${{ fromJson(github.repository_owner == 'subspace' && '["self-hosted", "macos-14-arm64"]' || '"macos-14"') }}
             target: x86_64-apple-darwin
             production_target: target/x86_64-apple-darwin/production
             suffix: macos-x86_64-${{ github.ref_name }}