diff --git a/src/openalpr/simpleini/simpleini.h b/src/openalpr/simpleini/simpleini.h
index 5db9a76..366a7f7 100644
--- a/src/openalpr/simpleini/simpleini.h
+++ b/src/openalpr/simpleini/simpleini.h
@@ -212,6 +212,7 @@
 # pragma warning (disable: 4127 4503 4702 4786)
 #endif
 
+#include <cstdlib>
 #include <cstring>
 #include <string>
 #include <map>
diff --git a/src/openalpr/support/timing.cpp b/src/openalpr/support/timing.cpp
index 438660c..0b66891 100644
--- a/src/openalpr/support/timing.cpp
+++ b/src/openalpr/support/timing.cpp
@@ -1,5 +1,10 @@
 #include "timing.h"
 
+#ifdef __MACH__
+#include <mach/clock.h>
+#include <mach/mach.h>
+#endif
+
 #ifdef WINDOWS
 
 
@@ -28,7 +33,19 @@ timespec diff(timespec start, timespec end);
 
 void getTime(timespec* time)
 {
+
+#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
+	clock_serv_t cclock;
+	mach_timespec_t mts;
+	host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+	clock_get_time(cclock, &mts);
+	mach_port_deallocate(mach_task_self(), cclock);
+	time->tv_sec = mts.tv_sec;
+	time->tv_nsec = mts.tv_nsec;
+#else
     clock_gettime(CLOCK_PROCESS_CPUTIME_ID, time);
+#endif
+
 }
 double diffclock(timespec time1,timespec time2)
 {
diff --git a/src/openalpr/utility.cpp b/src/openalpr/utility.cpp
index c5f9a47..7daccf4 100644
--- a/src/openalpr/utility.cpp
+++ b/src/openalpr/utility.cpp
@@ -22,7 +22,9 @@
 
 #include "utility.h"
 
- #include <omp.h>
+#ifndef __APPLE__ // CLang++ does not have yet implementet OpenMP
+#include <omp.h>
+#endif
 
 Rect expandRect(Rect original, int expandXPixels, int expandYPixels, int maxX, int maxY)
 {