diff --git a/.github/workflows/ci-macos.yml b/.github/workflows/ci-macos.yml
index 9d2c70cbb78..46fa10e8d34 100644
--- a/.github/workflows/ci-macos.yml
+++ b/.github/workflows/ci-macos.yml
@@ -34,11 +34,13 @@ jobs:
     uses: ./.github/workflows/macos.yml
     with:
       stage: "1"
+      max_parallel: 2
 
   stage-2:
     uses: ./.github/workflows/macos.yml
     with:
       stage: "2"
+      max_parallel: 1
     needs: [stage-1]
     if: ${{ success() || failure() }}
 
@@ -46,6 +48,7 @@ jobs:
     uses: ./.github/workflows/macos.yml
     with:
       stage: "2-optional-0-o"
+      max_parallel: 1
     needs: [stage-2]
     if: ${{ success() || failure() }}
 
@@ -53,6 +56,7 @@ jobs:
     uses: ./.github/workflows/macos.yml
     with:
       stage: "2-optional-p-z"
+      max_parallel: 1
     needs: [stage-2-optional-0-o]
     if: ${{ success() || failure() }}
 
@@ -60,6 +64,7 @@ jobs:
     uses: ./.github/workflows/macos.yml
     with:
       stage: "2-optional-0-o"
+      max_parallel: 1
     needs: [stage-2-optional-p-z]
     if: ${{ success() || failure() }}
 
@@ -67,6 +72,7 @@ jobs:
     uses: ./.github/workflows/macos.yml
     with:
       stage: "2-experimental-p-z"
+      max_parallel: 1
     needs: [stage-2-experimental-0-o]
     if: ${{ success() || failure() }}
 
@@ -106,7 +112,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
-      max-parallel: 4
+      max-parallel: 1
       matrix:
         os: [ macos-11, macos-12 ]
         tox_system_factor: [macos-nobootstrap]