diff --git a/Allwmake b/Allwmake
index 5acded1..7e009ec 100755
--- a/Allwmake
+++ b/Allwmake
@@ -92,7 +92,10 @@ echo "    $SCOTCH_ARCH_PATH"
 SCOTCH_SOURCE_DIR=$sourceBASE/$SCOTCH_VERSION
 
 # Needs generalizing, but works fairly well
-scotchMakefile=../../etc/makeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM
+scotchMakefile=etc/makeFiles/scotch/Makefile.inc.OpenFOAM-"$(uname -s)".shlib
+
+[ -f $scotchMakefile ] || \
+    scotchMakefile=${scotchMakefile%/*}/Makefile.inc.OpenFOAM-Linux.shlib
 
 if [ -f $SCOTCH_ARCH_PATH/include/scotch.h \
   -a -r $FOAM_EXT_LIBBIN/libscotch.$SO \
@@ -123,6 +126,9 @@ then
     mkdir -p $incDIR    2>/dev/null
     mkdir -p $libDIR    2>/dev/null
 
+    # Makefile relative to this directory
+    scotchMakefile=../../$scotchMakefile
+
     if [ -f $scotchMakefile ]
     then
         rm -f Makefile.inc
diff --git a/etc/makeFiles/scotch/Makefile.inc.OpenFOAM-Darwin.shlib b/etc/makeFiles/scotch/Makefile.inc.OpenFOAM-Darwin.shlib
new file mode 100644
index 0000000..3262a61
--- /dev/null
+++ b/etc/makeFiles/scotch/Makefile.inc.OpenFOAM-Darwin.shlib
@@ -0,0 +1,45 @@
+#-------------------------------*- makefile -*---------------------------------
+# OpenFOAM notes:
+#
+# WM_CFLAGS, WM_LDFLAGS contain "-m32 -fPIC" etc
+# WM_LABEL_SIZE == 64 for 'long' instead of 'int' for OpenFOAM labels
+#
+# - compiled without pthread
+#
+# Normally set CCS, CCP by caller
+
+EXE         =
+LIB         = .dylib
+OBJ         = .o
+
+AR          = $(CC)
+ARFLAGS     = $(WM_CFLAGS) -dynamiclib -undefined dynamic_lookup -o
+CCS        ?= $(CC)
+CCP        ?= mpicc
+CCD         = $(CCP)
+CFLAGS      = $(WM_CFLAGS) -O3 \
+    -DCOMMON_FILE_COMPRESS_GZ \
+    -DCOMMON_RANDOM_FIXED_SEED \
+    -DSCOTCH_DETERMINISTIC \
+    -DSCOTCH_RENAME \
+    -Drestrict=__restrict
+
+# 32-bit vs. 64-bit labels
+ifeq ($(WM_LABEL_SIZE),64)
+CFLAGS     += -DINTSIZE64
+endif
+
+CLIBFLAGS   =
+LDFLAGS     = $(WM_LDFLAGS) -lz -lm
+
+MAKE        = make
+CP          = cp
+CAT         = cat
+LN          = ln
+MKDIR       = mkdir
+MV          = mv
+RANLIB      = echo
+LEX         = flex -Pscotchyy -olex.yy.c
+YACC        = bison -pscotchyy -y -b y
+
+#------------------------------------------------------------------------------
diff --git a/etc/makeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM b/etc/makeFiles/scotch/Makefile.inc.OpenFOAM-Linux.shlib
similarity index 100%
rename from etc/makeFiles/scotch/Makefile.inc.i686_pc_linux2.shlib-OpenFOAM
rename to etc/makeFiles/scotch/Makefile.inc.OpenFOAM-Linux.shlib