Many apps on your MAC (such as TextEdit and Pages) will now autosave your document once the original document has been saved. It is no longer necessary to go to File> Save or Save as after making changes. (Note: the 'Save as' command can still be viewed by holding Option and clicking 'Duplicate'.

If you wish to go back to a previous version of the file after autosaving, just click 'File>Revert To' in the app's Menu.

TIMESAVER : Use the window's Title Bar to Save or Edit a File Name