diff --git a/Makefile b/Makefile
index 463e90d..dfad59a 100644
--- a/Makefile
+++ b/Makefile
@@ -25,8 +25,8 @@ ifneq ($(OS),Windows_NT)
 	else
 		# Assume ARM
 		SRC_DIR=src/arm/
-		SOURCE += $(COMMON_SRC) $(SRC_DIR)midr.c $(SRC_DIR)uarch.c $(SRC_DIR)soc.c $(SRC_DIR)udev.c
-		HEADERS += $(COMMON_HDR) $(SRC_DIR)midr.h $(SRC_DIR)uarch.h  $(SRC_DIR)soc.h $(SRC_DIR)udev.c $(SRC_DIR)socs.h
+		SOURCE += $(COMMON_SRC) $(SRC_DIR)midr.c $(SRC_DIR)uarch.c $(SRC_DIR)soc.c $(SRC_DIR)udev.c $(SRC_DIR)sysctl.c
+		HEADERS += $(COMMON_HDR) $(SRC_DIR)midr.h $(SRC_DIR)uarch.h  $(SRC_DIR)soc.h $(SRC_DIR)udev.c $(SRC_DIR)socs.h $(SRC_DIR)sysctl.h
 		CFLAGS += -DARCH_ARM -Wno-unused-parameter -std=c99
 	endif
 
diff --git a/src/arm/midr.c b/src/arm/midr.c
index 6c0b5f3..16a2e08 100644
--- a/src/arm/midr.c
+++ b/src/arm/midr.c
@@ -7,7 +7,9 @@
 
 #ifdef __linux__
   #include <sys/auxv.h>
-  #include <asm/hwcap.h>  
+  #include <asm/hwcap.h>
+#elif defined __APPLE__ || __MACH__
+  #include "sysctl.h"
 #endif
 
 #include "../common/global.h"
@@ -232,7 +234,7 @@ void get_cpu_info_mach(struct cpuInfo* cpu) {
 
   cpu->cach = get_cache_info(cpu);
   cpu->feat = get_features_info(); 
-  cpu->topo = malloc(sizeof(struct topology));
+  cpu->topo = get_topology_from_sysctl();
   cpu->freq = malloc(sizeof(struct frequency));
   cpu->freq->base = UNKNOWN_FREQ;
   cpu->freq->max = 1000000000;
diff --git a/src/arm/sysctl.c b/src/arm/sysctl.c
new file mode 100644
index 0000000..94f4a3f
--- /dev/null
+++ b/src/arm/sysctl.c
@@ -0,0 +1,25 @@
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "../common/global.h"
+#include "../common/cpu.h"
+
+struct topology* get_topology_from_sysctl() {
+  struct topology* t = malloc(sizeof(struct topology));
+  size_t dummy;
+
+  if(sysctlbyname("hw.physicalcpu_max", &t->total_cores, &dummy, NULL, 0) != 0) {
+    printWarn("sysctlbyname(\"hw.physicalcpu_max\") failed: %s\n", strerror(errno));
+    t->total_cores = 1;
+  }
+  else if(t->total_cores <= 0) {
+    printWarn("sysctlbyname(\"hw.physicalcpu_max\") returned invalid value: %d\n", t->total_cores);
+    t->total_cores = 1;
+  }
+
+  return t;
+}
+
diff --git a/src/arm/sysctl.h b/src/arm/sysctl.h
new file mode 100644
index 0000000..8d4bade
--- /dev/null
+++ b/src/arm/sysctl.h
@@ -0,0 +1,6 @@
+#ifndef __SYSCTL__
+#define __SYSCTL__
+
+struct topology* get_topology_from_sysctl();
+
+#endif