diff --git a/.github/workflows/omv-ci.yml b/.github/workflows/omv-ci.yml
index 2ab301a..7b8ef52 100644
--- a/.github/workflows/omv-ci.yml
+++ b/.github/workflows/omv-ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        runs-on: [ ubuntu-22.04, macos-14 ]
+        runs-on: [ ubuntu-22.04] #, macos-14 
         engine:
             - jNeuroML
             - jNeuroML_NEURON
@@ -26,21 +26,22 @@ jobs:
             - "EDEN:0.2.2"
             - "EDEN:0.2.3"
 
-        python-version: [ "3.12" ]
+        python-version: [ "3.11", "3.12" ]
         
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Set up Python  ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version:  ${{ matrix.python-version }}
         
     - name: Install OMV
       run: |
+        pip install setuptools==80 # needed for eden on Python 3.12...
+
         pip install git+https://github.com/OpenSourceBrain/osb-model-validation
 
-        pip install setuptools --upgrade # needed for eden on Python 3.12
         
     - name: Run OMV tests on engine ${{ matrix.engine }}
       run: |
diff --git a/.github/workflows/pip-install.yml b/.github/workflows/pip-install.yml
index 50cae26..30b8cf8 100644
--- a/.github/workflows/pip-install.yml
+++ b/.github/workflows/pip-install.yml
@@ -25,7 +25,7 @@ jobs:
         
     - name: Install EDEN using pip
       run: |
-        pip install setuptools --upgrade # needed for Python 3.12
+        pip install setuptools==80 # needed for Python 3.12
         pip install eden-simulator
 
     - name: Run EDEN example directly