Disable two tests on macOS which read from pipes

reported to be unstable
one of these is disabled in asyncio

Author: smurfix

tests/python/test_events.py

@@ -1460,9 +1460,7 @@ def connect():
         write_transport._pipe = None
 
     @unittest.skipUnless(sys.platform != 'win32', "Don't support pipes for Windows")
-    # select, poll and kqueue don't support character devices (PTY) on Mac OS X
-    # older than 10.6 (Snow Leopard)
-    @support.requires_mac_ver(10, 6)
+    @unittest.skipIf(sys.platform == 'darwin', 'test hangs on MacOS')
     # Issue #20495: The test hangs on FreeBSD 7.2 but pass on FreeBSD 9
     @support.requires_freebsd_version(8)
     def test_read_pty_output(self):
@@ -1600,9 +1598,7 @@ def reader(data):
         self.assertEqual('CLOSED', proto.state)
 
     @unittest.skipUnless(sys.platform != 'win32', "Don't support pipes for Windows")
-    # select, poll and kqueue don't support character devices (PTY) on Mac OS X
-    # older than 10.6 (Snow Leopard)
-    @support.requires_mac_ver(10, 6)
+    @unittest.skipIf(sys.platform == 'darwin', 'test may hang on MacOS')
     def test_bidirectional_pty(self):
         master, read_slave = os.openpty()
         write_slave = os.dup(read_slave)