Two Mac User Groups (MUGs) have scheduled a presentation called “Twenty Mac Years: The History of the Macintosh Through the Advertisements of Apple” to celebrate the 20th anniversary of the Mac. The presentation by Nicholas Pyers will be presented to the Apple Mac Users Society of Melbourne (AUSOM) at their Aug. 7 meeting. In September, Pyers will travel to the Wellington Macintosh Users Group in New Zealand to deliver the same presentation, reports The MUG Center, an online resource for MUGs.