diff --git a/.github/workflows/unittest-mpich.yml b/.github/workflows/unittest-mpich.yml
index 9e24625f..80b4b5fa 100644
--- a/.github/workflows/unittest-mpich.yml
+++ b/.github/workflows/unittest-mpich.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         include:
-        - operating-system: macos-11
+        - operating-system: macos-14
           python-version: '3.12'
           label: osx-64-py-3-12-mpich
           prefix: /Users/runner/miniconda3/envs/my-env
diff --git a/.github/workflows/unittest-openmpi.yml b/.github/workflows/unittest-openmpi.yml
index ff651757..8815d228 100644
--- a/.github/workflows/unittest-openmpi.yml
+++ b/.github/workflows/unittest-openmpi.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         include:
-        - operating-system: macos-11
+        - operating-system: macos-14
           python-version: '3.12'
           label: osx-64-py-3-12-openmpi
           prefix: /Users/runner/miniconda3/envs/my-env
diff --git a/pympipool/shared/communication.py b/pympipool/shared/communication.py
index 6272bc96..a9bcb82e 100644
--- a/pympipool/shared/communication.py
+++ b/pympipool/shared/communication.py
@@ -99,10 +99,10 @@ def interface_bootup(
     command_lst,
     connections,
 ):
-    command_lst += [
-        "--host",
-        gethostname(),
-    ]
+    # command_lst += [
+    #     "--host",
+    #     gethostname(),
+    # ]
     interface = SocketInterface(interface=connections)
     command_lst += [
         "--zmqport",