diff --git a/configure b/configure
index 8eb8200..26765d3 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,11 @@
 #!/usr/bin/env bash
 # Script to generate Mk_cmd for socrates
 
+# Optimisation flags options (uncomment as required)
+optim="-Ofast -march=native"
+# optim="-O3"
+# optim=""
+
 # Remove old files
 rm -rf "bin/"
 rm -f "set_rad_env"
@@ -29,8 +34,8 @@ if  [[ "$OSTYPE" == "darwin"* ]]; then
 else 
     extra=""
 fi 
-echo "FORTCOMP        = $fc -Ofast -fPIC $extra -c " >> $genpath
-echo "LINK            = $fc -Ofast -fPIC $extra " >> $genpath
+echo "FORTCOMP        = $fc $optim -fPIC $extra -c " >> $genpath
+echo "LINK            = $fc $optim -fPIC $extra " >> $genpath
 
 ar="$(command -v ar)"
 if [ -z "$ar" ]; then 
diff --git a/make/Mk_cmd b/make/Mk_cmd
index 27ea9cf..f22bc3d 100644
--- a/make/Mk_cmd
+++ b/make/Mk_cmd
@@ -1,12 +1,12 @@
 # Generated automatically
-# System: Linux norma2.intra.astro.rug.nl 5.14.0-362.18.1.el9_3.0.1.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Feb 11 13:49:23 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux 
-# Date: Thu May 30 05:46:41 PM CEST 2024 
+# System: Darwin hnmacbook 23.5.0 Darwin Kernel Version 23.5.0: Wed May  1 20:12:58 PDT 2024; root:xnu-10063.121.3~5/RELEASE_ARM64_T6000 arm64 
+# Date: Mon  3 Jun 2024 09:14:35 BST 
  
-FORTCOMP        = /usr/bin/gfortran -Ofast -fPIC  -c 
-LINK            = /usr/bin/gfortran -Ofast -fPIC  
+FORTCOMP        = /opt/homebrew/bin/gfortran -Ofast -march=native -fPIC -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib/ -c 
+LINK            = /opt/homebrew/bin/gfortran -Ofast -march=native -fPIC -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib/ 
 LIBLINK         = /usr/bin/ar rvu 
-INCCDF_PATH     = /usr/include -I/usr/lib64/gfortran/modules 
-LIBCDF_PATH     = netcdff 
+INCCDF_PATH     = /opt/homebrew/Cellar/netcdf-fortran/4.6.1/include -I/opt/homebrew/Cellar/netcdf-fortran/4.6.1/include -I/opt/homebrew/Cellar/netcdf-fortran/4.6.1/include 
+LIBCDF_PATH     = /opt/homebrew/Cellar/netcdf-fortran/4.6.1/lib 
 LIBCDF_NAME     = netcdff 
 OMPARG          = -fopenmp