--- init/Multiwfn.02.orig	2018-08-26 18:32:27 UTC
+++ init/Multiwfn.02
@@ -3,7 +3,7 @@ EOF
     echo "Starting Multiwfn with OMP_NUM_THREADS enabled..."
     if [ x$OMP_NUM_THREADS = 'x' ]
     then
-        nCPUs=`cat /proc/cpuinfo |grep processor|wc -l`
+        nCPUs=`sysctl -n hw.ncpu`
         echo "Warning! OMP_NUM_THREADS not set. As many as $nCPUs threads might be used."
     fi
     echo ""
@@ -20,7 +20,7 @@ else
         echo "Starting Multiwfn with OMP_NUM_THREADS enabled..."
         if [ x$OMP_NUM_THREADS = 'x' ]
         then
-            nCPUs=`cat /proc/cpuinfo |grep processor|wc -l`
+            nCPUs=`sysctl -n hw.ncpu`
             echo "Warning! OMP_NUM_THREADS not set. As many as $nCPUs threads might be used."
         fi
     fi