TST: un-xfail clipboard test on mac (#49270)

Author: jbrockmendel

pandas/tests/io/test_clipboard.py

@@ -4,6 +4,7 @@
 import numpy as np
 import pytest
 
+from pandas.compat import is_platform_mac
 from pandas.errors import (
     PyperclipException,
     PyperclipWindowsException,
@@ -393,7 +394,7 @@ def test_round_trip_valid_encodings(self, enc, df):
     @pytest.mark.single_cpu
     @pytest.mark.parametrize("data", ["\U0001f44d...", "Ωœ∑´...", "abcd..."])
     @pytest.mark.xfail(
-        os.environ.get("DISPLAY") is None,
+        os.environ.get("DISPLAY") is None and not is_platform_mac(),
         reason="Cannot be runed if a headless system is not put in place with Xvfb",
         strict=True,
     )