diff --git a/Doc/library/platform.rst b/Doc/library/platform.rst
index 60c6089ad3ccb5..771160cf4f81ea 100644
--- a/Doc/library/platform.rst
+++ b/Doc/library/platform.rst
@@ -40,9 +40,12 @@ Cross Platform
    and then only if the executable points to the Python interpreter.  Reasonable
    defaults are used when the above needs are not met.
 
+   To only get the pointer size of the running Python interpreter,
+   :attr:`sys.maxsize` or ``struct.calcsize('P')`` can be used.
+
    .. note::
 
-      On Mac OS X (and perhaps other platforms), executable files may be
+      On macOS (and perhaps other platforms), executable files can be
       universal files containing multiple architectures.
 
       To get at the "64-bitness" of the current interpreter, it is more