Index: setup.py
===================================================================
--- setup.py	(revision 63457)
+++ setup.py	(working copy)
@@ -1118,6 +1118,14 @@
         else:
             missing.append('ossaudiodev')
 
+        if sys.platform == 'darwin':
+            exts.append(
+                       Extension('_gestalt', ['_gestalt.c'],
+                       extra_link_args=['-framework', 'Carbon'])
+                       )
+        else:
+            missing.append('_gestalt')
+
         self.extensions.extend(exts)
 
         # Call the method for detecting whether _tkinter can be compiled
Index: Lib/platform.py
===================================================================
--- Lib/platform.py	(revision 63457)
+++ Lib/platform.py	(working copy)
@@ -676,14 +676,13 @@
 
 def _mac_ver_lookup(selectors,default=None):
 
-    from gestalt import gestalt
-    import MacOS
+    from _gestalt import gestalt
     l = []
     append = l.append
     for selector in selectors:
         try:
             append(gestalt(selector))
-        except (RuntimeError, MacOS.Error):
+        except (RuntimeError, OSError):
             append(default)
     return l
 
@@ -709,8 +708,7 @@
     """
     # Check whether the version info module is available
     try:
-        import gestalt
-        import MacOS
+        import _gestalt
     except ImportError:
         return release,versioninfo,machine
     # Get the infos
Index: Modules/_gestalt.c
===================================================================
--- Modules/_gestalt.c	(revision 0)
+++ Modules/_gestalt.c	(revision 0)
@@ -0,0 +1,72 @@
+/***********************************************************
+Copyright 1991-1997 by Stichting Mathematisch Centrum, Amsterdam,
+The Netherlands.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* Macintosh Gestalt interface */
+
+#include "Python.h"
+
+#include <Carbon/Carbon.h>
+
+/* Convert a 4-char string object argument to an OSType value */
+static int
+convert_to_OSType(PyObject *v, OSType *pr)
+{
+    uint32_t tmp;
+    if (!PyUnicode_Check(v) || PyUnicode_GetSize(v) != 4) {
+        PyErr_SetString(PyExc_TypeError,
+			"OSType arg must be string of 4 chars");
+        return 0;
+    }
+    memcpy((char *)&tmp, PyUnicode_AsString(v), 4);
+    *pr = (OSType)ntohl(tmp);
+    return 1;
+}
+
+static PyObject *
+gestalt_gestalt(PyObject *self, PyObject *args)
+{
+    OSErr iErr;
+    OSType selector;
+    SInt32 response;
+    if (!PyArg_ParseTuple(args, "O&", convert_to_OSType, &selector))
+            return NULL;
+    iErr = Gestalt(selector, &response);
+    if (iErr != 0) {
+        PyErr_SetString(PyExc_OSError,
+                        "non-zero exit code!");
+        return NULL;
+    }
+    return PyLong_FromLong(response);
+}
+
+static struct PyMethodDef gestalt_methods[] = {
+    {"gestalt", gestalt_gestalt, METH_VARARGS},
+    {NULL, NULL} /* Sentinel */
+};
+
+void
+init_gestalt(void)
+{
+    Py_InitModule("_gestalt", gestalt_methods);
+}