diff --git a/.travis.yml b/.travis.yml
index f609285..c581774 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,9 @@
 language: cpp
 
+os:
+  - linux
+  - osx
+
 compiler:
   - gcc
   - clang

diff --git a/.travis.yml b/.travis.yml
index f609285..c581774 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,9 @@
 language: cpp
 
+os:
+  - linux
+  - osx
+
 compiler:
   - gcc
   - clang
diff --git a/utest.h b/utest.h
index 54ea260..c58b39a 100644
--- a/utest.h
+++ b/utest.h
@@ -76,6 +76,8 @@
 #endif // ((2 < __GLIBC__) || ((2 == __GLIBC__) && (17 <= __GLIBC_MINOR__)))
 #endif // defined(__GLIBC__) && defined(__GLIBC_MINOR__)
 
+#elif defined(__APPLE__)
+#include <mach/mach_time.h>
 #endif
 
 #if defined(_MSC_VER)
@@ -125,6 +127,8 @@
   syscall(SYS_clock_gettime, cid, &ts);
 #endif
   return UTEST_CAST(int64_t, ts.tv_sec) * 1000 * 1000 * 1000 + ts.tv_nsec;
+#elif __APPLE__
+  return UTEST_CAST(int64_t, mach_absolute_time());
 #endif
 }