MacPython on MacOSX DP4 gets started in the wrong directory. The workaround (ifdeffed by USE_ARGV0_CHDIR) is to do a chdir() to the folder part of our executable name.
diff --git a/Mac/Python/macmain.c b/Mac/Python/macmain.c
index d40a70e..20dd4cb 100644
--- a/Mac/Python/macmain.c
+++ b/Mac/Python/macmain.c
@@ -256,7 +256,22 @@
} else {
/* Create argc/argv. Do it before we go into the options event loop. */
*argcp = PyMac_GetArgv(argvp, options.noargs);
-
+#ifdef USE_ARGV0_CHDIR
+ printf("argc=%d, argv[0]=%x=%s\n", *argcp, (*argvp)[0], (*argvp)[0]);
+ if (*argcp >= 1 && (*argvp)[0] && (*argvp)[0][0]) {
+ /* Workaround for MacOS X, which currently (DP4) doesn't set
+ ** the working folder correctly
+ */
+ char app_wd[256], *p;
+
+ strncpy(app_wd, (*argvp)[0], 256);
+ printf("Modifying dir, argv[0]=%s\n", (*argvp)[0]);
+ p = strrchr(app_wd, ':');
+ if ( p ) *p = 0;
+ printf("app_wd=%s\n", app_wd);
+ chdir(app_wd);
+ }
+#endif
/* Do interactive option setting, if allowed and <option> depressed */
PyMac_InteractiveOptions(&options, argcp, argvp);
}