diff --git a/direct/src/showbase/VFSImporter.py b/direct/src/showbase/VFSImporter.py
index 463281e391..cc09d6de14 100644
--- a/direct/src/showbase/VFSImporter.py
+++ b/direct/src/showbase/VFSImporter.py
@@ -65,7 +65,7 @@ class VFSImporter:
         vfile = vfs.getFile(filename, True)
         if vfile:
             return VFSLoader(dir_path, vfile, filename,
-                             desc=('.py', 'U', imp.PY_SOURCE))
+                             desc=('.py', 'r', imp.PY_SOURCE))
 
         # If there's no .py file, but there's a .pyc file, load that
         # anyway.
@@ -93,7 +93,7 @@ class VFSImporter:
         vfile = vfs.getFile(filename, True)
         if vfile:
             return VFSLoader(dir_path, vfile, filename, packagePath=path,
-                             desc=('.py', 'U', imp.PY_SOURCE))
+                             desc=('.py', 'r', imp.PY_SOURCE))
         for ext in compiledExtensions:
             filename = Filename(path, '__init__.' + ext)
             vfile = vfs.getFile(filename, True)
diff --git a/makepanda/makepackage.py b/makepanda/makepackage.py
index 558ee1d6bc..c0eac19f1f 100755
--- a/makepanda/makepackage.py
+++ b/makepanda/makepackage.py
@@ -117,8 +117,8 @@ deps: {DEPENDS}
 MACOS_SCRIPT_PREFIX = \
 """#!/bin/bash
 IFS=.
-read -a version_info <<< "`sw_vers -productVersion`'"
-if (( ${version_info[1]} < 15 )); then
+read -a version_info <<< "`sw_vers -productVersion`"
+if (( ${version_info[0]} == 10 && ${version_info[1]} < 15 )); then
 """
 
 MACOS_SCRIPT_POSTFIX = \
diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 8a76831217..ca6fb87929 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -272,7 +272,7 @@ def parseopts(args):
         try:
             maj, min = OSXTARGET.strip().split('.')
             OSXTARGET = int(maj), int(min)
-            assert OSXTARGET[0] == 10
+            assert OSXTARGET[0] >= 10
         except:
             usage("Invalid setting for OSXTARGET")
 
@@ -2361,9 +2361,6 @@ def WriteConfigSettings():
         dtool_config["HAVE_VIDEO4LINUX"] = 'UNDEF'
         dtool_config["PHAVE_LINUX_INPUT_H"] = 'UNDEF'
         dtool_config["IS_OSX"] = '1'
-        # 10.4 had a broken ucontext implementation
-        if int(platform.mac_ver()[0][3]) <= 4:
-            dtool_config["PHAVE_UCONTEXT_H"] = 'UNDEF'
 
     if PkgSkip("X11"):
         dtool_config["HAVE_GLX"] = 'UNDEF'