diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 82b604d..6991cad 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -68,10 +68,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        # macos-12 uses x86_64, macos-14 aarch64
+        # macos-13 uses x86_64, macos-14 aarch64
         # see https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources
         include:
-          - os: macos-12
+          - os: macos-13
             arch: x86_64
             toolchain: x86_64-apple-darwin
           - os: macos-14
@@ -82,6 +82,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Cargo cache
+        if: ${{ matrix.os != 'macos-13' }} # when using cache, the 'Setup Rust' step fails for macos 13
         uses: actions/cache@v4
         with:
           path: |