diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 00000000..94a51578
Binary files /dev/null and b/.DS_Store differ
diff --git a/picasso/.DS_Store b/picasso/.DS_Store
new file mode 100644
index 00000000..4c616595
Binary files /dev/null and b/picasso/.DS_Store differ
diff --git a/picasso/gui/render.py b/picasso/gui/render.py
index 9bd6eb13..14eb4da7 100644
--- a/picasso/gui/render.py
+++ b/picasso/gui/render.py
@@ -17,6 +17,7 @@
 
 import lmfit
 import matplotlib
+matplotlib.use('agg')
 import matplotlib.pyplot as plt
 import matplotlib.patches as patches
 import numpy as np