diff --git a/systems/mac-arm/config-command-mpi b/systems/mac-arm/config-command-mpi
index a900fc2d..c2f664d4 100644
--- a/systems/mac-arm/config-command-mpi
+++ b/systems/mac-arm/config-command-mpi
@@ -1 +1,2 @@
-CXX=mpicxx-openmpi-mp CXXFLAGS=-I/opt/local/include/ LDFLAGS=-L/opt/local/lib/ ../../configure --enable-simd=GEN --enable-debug --enable-comms=mpi --enable-unified=no
+BREW=/opt/local/
+MPICXX=mpicxx CXX=c++-12 ../../configure --enable-simd=GEN --enable-comms=mpi-auto --enable-unified=yes --prefix $HOME/QCD/GridInstallOpt --with-lime=/Users/peterboyle/QCD/SciDAC/install/ --with-openssl=$BREW