diff --git a/arch/Darwin-gfortran.psmp b/arch/Darwin-gfortran.psmp
index b24e51d589..4e02c0c52e 100644
--- a/arch/Darwin-gfortran.psmp
+++ b/arch/Darwin-gfortran.psmp
@@ -7,9 +7,10 @@ FC       = mpif90
 LD       = mpif90
 AR       = ar -r
 RANLIB   = ranlib
+CFLAGS   = -O2 -fopenmp -g
 DFLAGS   = -D__MPI_VERSION=3 -D__parallel -D__SCALAPACK \
            -D__NO_STATM_ACCESS -D__ACCELERATE -D__LIBXC -D__LIBINT
-FCFLAGS  = -I $(LIBXC_INCLUDE_DIR) -I $(LIBINT_INCLUDE_DIR) -fopenmp -O2 \
+FCFLAGS  = -I $(LIBXC_INCLUDE_DIR) -I $(LIBINT_INCLUDE_DIR) -fopenmp -O2 -g \
            -funroll-loops -ftree-vectorize -ffree-form $(DFLAGS)
 LDFLAGS  = $(FCFLAGS)
 LIBS     = -framework Accelerate -lscalapack \
diff --git a/arch/Darwin-gfortran.sdbg b/arch/Darwin-gfortran.sdbg
deleted file mode 100644
index 44957beb89..0000000000
--- a/arch/Darwin-gfortran.sdbg
+++ /dev/null
@@ -1,14 +0,0 @@
-# With GCC 4.9 or later, for gcc and gfortran
-# libxc is installed in LIBXC_INCLUDE_DIR / LIBXC_LIB_DIR
-# libint is installed in LIBINT_INCLUDE_DIR / LIBINT_LIB_DIR
-CC       = gcc
-FC       = gfortran
-LD       = gfortran
-AR       = ar -r
-RANLIB   = ranlib
-DFLAGS   = -D__NO_STATM_ACCESS -D__ACCELERATE -D__LIBXC -D__LIBINT
-FCFLAGS  = -I $(LIBXC_INCLUDE_DIR) -I $(LIBINT_INCLUDE_DIR) -O0 -g -fcheck=all -ffree-form $(DFLAGS)
-LDFLAGS  = $(FCFLAGS)
-LIBS     = -framework Accelerate \
-           -L$(LIBXC_LIB_DIR) -lxcf03 -lxc \
-           -L$(LIBINT_LIB_DIR) -lint2
diff --git a/arch/Darwin-gfortran.ssmp b/arch/Darwin-gfortran.ssmp
index 618c3a93ed..9806c685a1 100644
--- a/arch/Darwin-gfortran.ssmp
+++ b/arch/Darwin-gfortran.ssmp
@@ -6,9 +6,10 @@ FC       = gfortran
 LD       = gfortran
 AR       = ar -r
 RANLIB   = ranlib
+CFLAGS   = -O2 -fopenmp -g
 DFLAGS   = -D__NO_STATM_ACCESS -D__ACCELERATE -D__LIBXC -D__LIBINT
 FCFLAGS  = -I $(LIBXC_INCLUDE_DIR) -I $(LIBINT_INCLUDE_DIR) -fopenmp -funroll-loops \
-           -ftree-vectorize -ffree-form -O2 $(DFLAGS)
+           -ftree-vectorize -ffree-form -O2 -g $(DFLAGS)
 LDFLAGS  = $(FCFLAGS)
 LIBS     = -framework Accelerate \
            -L$(LIBXC_LIB_DIR) -lxcf03 -lxc \