Mac addicts, take note: The Hawaii Macintosh & Apple Users' Society and the Professional Photographers of Hawaii team up to present Mactoberfest, a day of many things techno/photo.

Among the activities: a camera and computer swap meet, presentations and workshops, door prizes, a computer help clinic and a digital art gallery.

It happens from 9 a.m. to 2 p.m. today at the 'Ohi'a Building of Kapi'olani Community College and it's free. http://hmaus.org.