diff --git a/seismic/ASDFdatabase/waveform_analytics.py b/seismic/ASDFdatabase/waveform_analytics.py
index 3d7b9541..e6c18ca1 100644
--- a/seismic/ASDFdatabase/waveform_analytics.py
+++ b/seismic/ASDFdatabase/waveform_analytics.py
@@ -16,6 +16,8 @@
 import os, sys
 
 is_windows = sys.platform.startswith('win')
+is_osx = sys.platform.startswith('darwin')
+
 if(is_windows): # suppress warnings on windows
     import warnings
     warnings.filterwarnings('ignore', \
@@ -46,6 +48,7 @@
 import psutil
 
 from pathos.multiprocessing import ProcessingPool as Pool
+import multiprocess
 from multiprocess import Manager, freeze_support
 
 matplotlib.use('TKAgg')
@@ -810,6 +813,7 @@ def get_time_range_func(net, sta, loc, cha):
 if __name__ == "__main__":
     # add support for process-based multiprocessing for a Windows .exe
     if(is_windows): freeze_support()
-    
+    if(is_osx): multiprocess.set_start_method('spawn')
+
     groups()
 # end func