diff --git a/contrib/macdeploy/custom_dsstore.py b/contrib/macdeploy/custom_dsstore.py
--- a/contrib/macdeploy/custom_dsstore.py
+++ b/contrib/macdeploy/custom_dsstore.py
@@ -14,7 +14,7 @@
 ds = DSStore.open(output_file, 'w+')
 ds['.']['bwsp'] = {
     'ShowStatusBar': False,
-    'WindowBounds': b'{{300, 280}, {500, 343}}',
+    'WindowBounds': '{{300, 280}, {500, 343}}',
     'ContainerShowSidebar': False,
     'SidebarWidth': 0,
     'ShowTabView': False,