MacIntosh worked on the comic strip Sally Forth along with colleague and writer Francesco Marciuliano until his retirement in 2013.
He grew up in a Navy family and lived on both coasts as a child and considers Honolulu his hometown.
In 1986, he and cartoonist Steve Sack joined to create the children's cartoon feature Professor Doodles.
In 1992, he left the paper to work full-time on the syndicated cartoon strip Sally Forth, created by Greg Howard.
He has nine books currently published as of the time of this writing -- McFadden's War (a crime story set in the Philippines), The Last Lightning (a World War II novel),The Fortunate Orphans (another World War II story), a series of adventures of fictional former Navy Seal Tom Wolf and Til Kingdom Key ( a Constable Jeremiah McKay mystery set in the Bahamas).