--- a/configure.ac
+++ b/configure.ac
@@ -6827,7 +6827,7 @@
 AS_CASE([$ac_sys_system],
   [AIX], [PY_STDLIB_MOD_SET_NA([_scproxy], [spwd])],
   [VxWorks*], [PY_STDLIB_MOD_SET_NA([_scproxy], [_crypt], [termios], [grp])],
-  [Darwin], [PY_STDLIB_MOD_SET_NA([ossaudiodev], [spwd])],
+  [Darwin], [PY_STDLIB_MOD_SET_NA([ossaudiodev], [spwd], [_posixsubprocess], [_scproxy], [_tkinter], [_xxsubinterpreters])],
   [CYGWIN*], [PY_STDLIB_MOD_SET_NA([_scproxy], [nis])],
   [QNX*], [PY_STDLIB_MOD_SET_NA([_scproxy], [nis])],
   [FreeBSD*], [PY_STDLIB_MOD_SET_NA([_scproxy], [spwd])],
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -605,6 +605,7 @@
         fullname = path.join(dir, file)
         try:
             exec_func(fullname, *argrest)
+            return
         except (FileNotFoundError, NotADirectoryError) as e:
             last_exc = e
         except OSError as e:
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -607,7 +607,7 @@
         default in case the command should fail.
 
     """
-    if sys.platform in ('dos', 'win32', 'win16'):
+    if sys.platform in ('dos', 'win32', 'win16', 'darwin'):
         # XXX Others too ?
         return default
 
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -75,7 +75,7 @@
     _mswindows = True
 
 # wasm32-emscripten and wasm32-wasi do not support processes
-_can_fork_exec = sys.platform not in {"emscripten", "wasi"}
+_can_fork_exec = sys.platform not in {"emscripten", "wasi", "darwin"}
 
 if _mswindows:
     import _winapi
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -2624,11 +2624,9 @@
 
 
 if sys.platform == 'darwin':
-    from _scproxy import _get_proxy_settings, _get_proxies
 
     def proxy_bypass_macosx_sysconf(host):
-        proxy_settings = _get_proxy_settings()
-        return _proxy_bypass_macosx_sysconf(host, proxy_settings)
+        return False
 
     def getproxies_macosx_sysconf():
         """Return a dictionary of scheme -> proxy server URL mappings.
@@ -2636,7 +2636,7 @@
         This function uses the MacOSX framework SystemConfiguration
         to fetch the proxy information.
         """
-        return _get_proxies()
+        return {}
 
 
 
@@ -2649,9 +2649,9 @@
         """
         proxies = getproxies_environment()
         if proxies:
-            return proxy_bypass_environment(host, proxies)
+            return False
         else:
-            return proxy_bypass_macosx_sysconf(host)
+            return False
 
     def getproxies():
         return getproxies_environment() or getproxies_macosx_sysconf()
--- a/Modules/_posixsubprocess.c
+++ b/Modules/_posixsubprocess.c
@@ -71,6 +71,10 @@
 #define MAX_GROUPS 64
 #endif
 
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
 #define POSIX_CALL(call)   do { if ((call) == -1) goto error; } while (0)
 
 static struct PyModuleDef _posixsubprocessmodule;
@@ -661,14 +665,25 @@
     for (i = 0; exec_array[i] != NULL; ++i) {
         const char *executable = exec_array[i];
         if (envp) {
-            execve(executable, argv, envp);
+#if defined(TARGET_OS_TV)
+            saved_errno = ENOTSUP;
+#elif defined(TARGET_OS_IOS)
+            saved_errno = execve(executable, argv, envp);
+#endif
+            break;
         } else {
-            execv(executable, argv);
+#if defined(TARGET_OS_TV)
+            saved_errno = ENOTSUP;
+#elif defined(TARGET_OS_IOS)
+            saved_errno = execv(executable, argv);
+#endif
+            break;
         }
         if (errno != ENOENT && errno != ENOTDIR && saved_errno == 0) {
             saved_errno = errno;
         }
     }
+    if (saved_errno == 0) return;
     /* Report the first exec error, not the last. */
     if (saved_errno)
         errno = saved_errno;
@@ -751,7 +766,12 @@
     } else
 #endif
     {
+#if defined(TARGET_OS_TV)
+        pid = -1;
+        errno = ENOTSUP;
+#else
         pid = fork();
+#endif
     }
 
     if (pid != 0) {
@@ -763,6 +783,7 @@
      * the code below.
      */
 
+#if !defined(TARGET_OS_TV)
     if (preexec_fn != Py_None) {
         /* We'll be calling back into Python later so we need to do this.
          * This call may not be async-signal-safe but neither is calling
@@ -779,6 +800,7 @@
                call_setuid, uid, child_umask, child_sigmask,
                py_fds_to_keep, preexec_fn, preexec_fn_args_tuple);
     _exit(255);
+#endif
     return 0;  /* Dead code to avoid a potential compiler warning. */
 }
 
@@ -990,8 +1012,10 @@
         preexec_fn_args_tuple = PyTuple_New(0);
         if (!preexec_fn_args_tuple)
             goto cleanup;
+#if !defined(TARGET_OS_TV)
         PyOS_BeforeFork();
         need_after_fork = 1;
+#endif
     }
 
     /* NOTE: When old_sigmask is non-NULL, do_fork_exec() may use vfork(). */
@@ -1051,8 +1073,10 @@
     }
 #endif
 
+#if !defined(TARGET_OS_TV)
     if (need_after_fork)
         PyOS_AfterFork_Parent();
+#endif
 
 cleanup:
     if (saved_errno != 0) {