diff --git a/platform/exec/exec.OSX_SONOMA b/platform/exec/exec.OSX_SONOMA
index 66e86c973..07e302a2c 100755
--- a/platform/exec/exec.OSX_SONOMA
+++ b/platform/exec/exec.OSX_SONOMA
@@ -1,8 +1,5 @@
 #!/bin/sh
-# GACODE Parallel execution script (OSX_MONTEREY)
-#
-# NOTES:
-# Used openmpi, so use mpirun rather than mpiexec
+# GACODE Parallel execution script (OSX_MOUNTAINLION)
 
 simdir=${1}
 nmpi=${2}
@@ -11,8 +8,6 @@ nomp=${4}
 numa=${5}
 mpinuma=${6}
 
-echo $simdir
-
 cd $simdir
-export OMP_NUM_THREADS=$nomp 
-mpirun -np $nmpi $exec
+mpirun -env OMP_NUM_THREADS $nomp -np $nmpi $exec
+
diff --git a/platform/exec/exec.OSX_SONOMA_M3 b/platform/exec/exec.OSX_SONOMA_M3
index 66e86c973..27e45f6f0 100755
--- a/platform/exec/exec.OSX_SONOMA_M3
+++ b/platform/exec/exec.OSX_SONOMA_M3
@@ -1,8 +1,5 @@
 #!/bin/sh
-# GACODE Parallel execution script (OSX_MONTEREY)
-#
-# NOTES:
-# Used openmpi, so use mpirun rather than mpiexec
+# GACODE Parallel execution script (OSX_MOUNTAINLION)
 
 simdir=${1}
 nmpi=${2}
@@ -11,8 +8,7 @@ nomp=${4}
 numa=${5}
 mpinuma=${6}
 
-echo $simdir
+export OMP_NUM_THREADS=$nomp
 
 cd $simdir
-export OMP_NUM_THREADS=$nomp 
 mpirun -np $nmpi $exec