diff --git a/.github/workflows/test-build.yml b/.github/workflows/test-build.yml
index 5e990d0a5..30b98c9b4 100644
--- a/.github/workflows/test-build.yml
+++ b/.github/workflows/test-build.yml
@@ -114,7 +114,8 @@ jobs:
       CC: clang
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
+        #os: [ubuntu-latest, macos-latest]
       fail-fast: false
     steps:
       - name: Checkout Yosys
diff --git a/.github/workflows/test-sanitizers.yml b/.github/workflows/test-sanitizers.yml
index 6f3c10903..562a87f76 100644
--- a/.github/workflows/test-sanitizers.yml
+++ b/.github/workflows/test-sanitizers.yml
@@ -42,7 +42,8 @@ jobs:
       UBSAN_OPTIONS: halt_on_error=1
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
+        #os: [ubuntu-latest, macos-latest]
         sanitizer: ['undefined,address']
       fail-fast: false
     steps: