How-to: Proper Gmail IMAP for iPhone & Apple Mail
gmail is going IMAP, which I have waited for for a long time. In fact I wouldn't use gmail for a time because it was not IMAP. But it will be any moment now, and here are the instructions to set up mail.app on your Mac. (Also instructions for iPhone, which is not legal in Vermont).
gmail IMAP mail.app Macintosh