diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index a055f7e083..1f21787087 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -6796,8 +6796,8 @@ def MakeInstallerOSX():
         oscmd("cp -R %s/pandac                dstroot/pythoncode/Developer/Panda3D/pandac" % GetOutputDir())
         oscmd("cp -R %s/direct                dstroot/pythoncode/Developer/Panda3D/direct" % GetOutputDir())
         oscmd("ln -s %s                       dstroot/pythoncode/usr/local/bin/ppython" % SDK["PYTHONEXEC"])
-        oscmd("cp -R %s/*.so                  dstroot/pythoncode/Developer/Panda3D/" % GetOutputDir())
-        oscmd("cp -R %s/*.py                  dstroot/pythoncode/Developer/Panda3D/" % GetOutputDir())
+        oscmd("cp -R %s/*.so                  dstroot/pythoncode/Developer/Panda3D/" % GetOutputDir(), True)
+        oscmd("cp -R %s/*.py                  dstroot/pythoncode/Developer/Panda3D/" % GetOutputDir(), True)
         if os.path.isdir(GetOutputDir()+"/Pmw"):
             oscmd("cp -R %s/Pmw               dstroot/pythoncode/Developer/Panda3D/Pmw" % GetOutputDir())
             compileall.compile_dir("dstroot/pythoncode/Developer/Panda3D/Pmw")