diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index da3799a2..6df2ffd6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -27,18 +27,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['ubuntu-latest']
+        os: ['ubuntu-latest', macos-latest]
         pydantic-version: [">1"]
         python-version:
           - "3.10"
           - "3.11"
           - "3.12"
         include:
-            # Note: pinned to macos-12
+            # Note: we still need to add support for macos-13
             # see https://github.com/OpenFreeEnergy/openfe/issues/842
-          - os: "macos-12"
-            python-version: "3.11"
-            pydantic-version: ">1"
           - os: "ubuntu-latest"
             python-version: "3.11"
             pydantic-version: "<2"
diff --git a/.github/workflows/conda_cron.yaml b/.github/workflows/conda_cron.yaml
index 33d3a954..c4f7ec49 100644
--- a/.github/workflows/conda_cron.yaml
+++ b/.github/workflows/conda_cron.yaml
@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['ubuntu-latest', 'macos-14']
+        os: ['ubuntu-latest', 'macos-latest']
         python-version:
           - "3.10"
           - "3.11"