DOC: fix small issues (pandas-dev#42621)

read_clipboard passes the text to read_csv not read_table. See here for example: https://pandas.pydata.org/docs/dev/reference/api/pandas.read_clipboard.html

also replace "OS X" -> macOS

Author: partev

pandas/core/generic.py

@@ -2988,15 +2988,15 @@ def to_clipboard(
         --------
         DataFrame.to_csv : Write a DataFrame to a comma-separated values
             (csv) file.
-        read_clipboard : Read text from clipboard and pass to read_table.
+        read_clipboard : Read text from clipboard and pass to read_csv.
 
         Notes
         -----
         Requirements for your platform.
 
           - Linux : `xclip`, or `xsel` (with `PyQt4` modules)
           - Windows : none
-          - OS X : none
+          - macOS : none
 
         Examples
         --------