diff --git a/HISTORY.rst b/HISTORY.rst
index b6e92f5..9a1624c 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,10 @@
 Release History
 ---------------
 
+0.1.9 (2018-02-22)
+++++++++++++++++++
+- Use find_library to load libiperf (Thanks to @Austinpayne). This should allow iperf3 lib to run on Mac OS X.
+
 0.1.8 (2018-01-24)
 ++++++++++++++++++
 - Fixed segmentation fault on several Linux distro's (Thanks to @illu89)
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 8024c1f..d9b0550 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -66,9 +66,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '0.1.8'
+version = '0.1.9'
 # The full version, including alpha/beta/rc tags.
-release = '0.1.8'
+release = '0.1.9'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/iperf3/iperf3.py b/iperf3/iperf3.py
index 0170eb5..518b368 100755
--- a/iperf3/iperf3.py
+++ b/iperf3/iperf3.py
@@ -18,7 +18,7 @@ class provides common settings for the :class:`Client` and :class:`Server`
 .. moduleauthor:: Mathijs Mortimer <mathijs@mortimer.nl>
 """
 
-from ctypes import cdll, c_char_p, c_int, c_char, c_void_p, c_uint64
+from ctypes import util, cdll, c_char_p, c_int, c_char, c_void_p, c_uint64
 import os
 import select
 import json
@@ -31,7 +31,7 @@ class provides common settings for the :class:`Client` and :class:`Server`
     from Queue import Queue  # Python2 compatibility
 
 
-__version__ = '0.1.8'
+__version__ = '0.1.9'
 
 
 MAX_UDP_BULKSIZE = (65535 - 8 - 20)
@@ -88,15 +88,16 @@ class IPerf3(object):
     """
     def __init__(self,
                  role,
-                 verbose=True,
-                 lib_name='libiperf.so.0'):
+                 verbose=True):
         """Initialise the iperf shared library
 
         :param role: 'c' = client; 's' = server
         :param verbose: enable verbose output
-        :param lib_name: The libiperf name providing the API to iperf3
         """
-        # TODO use find_library to find the best library
+        lib_name = util.find_library('libiperf')
+        if lib_name is None:
+            lib_name = 'libiperf.so.0'
+
         try:
             self.lib = cdll.LoadLibrary(lib_name)
         except OSError:
@@ -801,24 +802,33 @@ def __init__(self, result):
 
             # TCP specific test results
             if self.protocol == 'TCP':
-                self.sent_bytes = self.json['end']['sum_sent']['bytes']
-                self.sent_bps = self.json['end']['sum_sent']['bits_per_second']
-                self.received_bytes = self.json['end']['sum_received']['bytes']
-                self.received_bps = self.json['end']['sum_received']['bits_per_second']
-
-                #  Bits are measured in 10**3 terms, Bytes are measured in 2**10 terms
-                self.sent_kbps = self.sent_bps / 1000           # Kilobits per second
-                self.sent_Mbps = self.sent_kbps / 1000          # Megabits per second
-                self.sent_kB_s = self.sent_bps / (8 * 1024)     # kiloBytes per second
-                self.sent_MB_s = self.sent_kB_s / 1024          # MegaBytes per second
-
-                self.received_kbps = self.received_bps / 1000   # Kilobits per second
-                self.received_Mbps = self.received_kbps / 1000  # Megabits per second
-                self.received_kB_s = self.received_bps / (8* 1024)     # kiloBytes per second
-                self.received_MB_s = self.received_kB_s / 1024     # MegaBytes per second
+                sent_json = self.json['end']['sum_sent']
+                self.sent_bytes = sent_json['bytes']
+                self.sent_bps = sent_json['bits_per_second']
+
+                recv_json = self.json['end']['sum_received']
+                self.received_bytes = recv_json['bytes']
+                self.received_bps = recv_json['bits_per_second']
+
+                # Bits are measured in 10**3 terms
+                # Bytes are measured in 2**10 terms
+                # kbps = Kilobits per second
+                # Mbps = Megabits per second
+                # kB_s = kiloBytes per second
+                # MB_s = MegaBytes per second
+
+                self.sent_kbps = self.sent_bps / 1000
+                self.sent_Mbps = self.sent_kbps / 1000
+                self.sent_kB_s = self.sent_bps / (8 * 1024)
+                self.sent_MB_s = self.sent_kB_s / 1024
+
+                self.received_kbps = self.received_bps / 1000
+                self.received_Mbps = self.received_kbps / 1000
+                self.received_kB_s = self.received_bps / (8 * 1024)
+                self.received_MB_s = self.received_kB_s / 1024
 
                 # retransmits only returned from client
-                self.retransmits = self.json['end']['sum_sent'].get('retransmits')
+                self.retransmits = sent_json.get('retransmits')
 
             # UDP specific test results
             elif self.protocol == 'UDP':
diff --git a/tests/test_iperf3.py b/tests/test_iperf3.py
index cf30aa0..2bd3c89 100644
--- a/tests/test_iperf3.py
+++ b/tests/test_iperf3.py
@@ -9,10 +9,6 @@ def isclose(a, b, rel_tol=1e-09, abs_tol=0.0):
 
 class TestPyPerf:
 
-    def test_unavailable_library(self):
-        with pytest.raises(OSError):
-            client = iperf3.Client(lib_name='bla')
-
     def test_init_client(self):
         client = iperf3.Client()
         assert client._test