diff --git a/.github/workflows/releases.yml b/.github/workflows/releases.yml
index 95305da..d788649 100644
--- a/.github/workflows/releases.yml
+++ b/.github/workflows/releases.yml
@@ -59,6 +59,10 @@ jobs:
 
       - name: Build linux C and Rust libraries      
         run: |
+          # Fix permissions- output files from maturn=action end up owned by runner:docker
+          # so lets change them back to root:root
+          sudo chown -R root:root .
+         
           export TAG="$(git describe --tags)"
           echo "TAG=$TAG"
 
@@ -113,10 +117,12 @@ jobs:
     strategy:
       matrix:
         platform: # see https://github.com/actions/runner-images?tab=readme-ov-file#available-images for runner types
-          - runner: macos-14-large
+          - runner: macos-13
             target: x86_64
           - runner: macos-14
             target: aarch64
+          - runner: macos-15
+            target: aarch64
     steps:      
       - name: Checkout repository
         uses: actions/checkout@v4      
@@ -138,7 +144,7 @@ jobs:
           path: dist
 
       - name: Build C and Rust libraries
-        run: |
+        run: |                  
           export TAG="$(git describe --tags)"
           echo "TAG=$TAG"
 
diff --git a/.github/workflows/run_python_tests.yml b/.github/workflows/run_python_tests.yml
index 2a586e3..5d16bea 100644
--- a/.github/workflows/run_python_tests.yml
+++ b/.github/workflows/run_python_tests.yml
@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         # see https://github.com/actions/runner-images?tab=readme-ov-file#available-images for runner types
-        os: [ubuntu-latest, macos-14, macos-14-large] # macos-14 is Arm64, macos-14-large is x86_64 
+        os: [ubuntu-latest, macos-13, macos-14, macos-15] # macos-13 is x86_64, macos-14 & 15 are Arm64
         python-version: [3.9, "3.10", "3.11", "3.12", "3.13"]
         exclude:          
           - os: macOS-14
diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index db76b43..a999413 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         # see https://github.com/actions/runner-images?tab=readme-ov-file#available-images for runner types
-        os: [ubuntu-latest, macos-14, macos-14-large] # macos-14 is Arm64, macos-14-large is x86_64
+        os: [ubuntu-latest, macos-13, macos-14, macos-15] # macos-13 is x86_64, macos-14 & 15 are Arm64
     steps:
     - name: Checkout sources
       uses: actions/checkout@v4