doc: "Mac OS " -> "macOS" (GH-27534)

diff --git a/Doc/library/platform.rst b/Doc/library/platform.rst
index be86e568c180baeb576ce2bccc30758c4ec24814..bb9fc45df233bfbd3c7fb8f7a7467cd5ae098b95 100644 (file)
--- a/Doc/library/platform.rst
+++ b/Doc/library/platform.rst
@@ -42,7 +42,7 @@ Cross Platform
 
    .. note::
 
-      On Mac OS X (and perhaps other platforms), executable files may be
+      On macOS (and perhaps other platforms), executable files may be
       universal files containing multiple architectures.
 
       To get at the "64-bitness" of the current interpreter, it is more