A silent auction of some of his works will be held at the Whisky Gallery, in the Loan and Merc building, at 10am tomorrow.
MacGregor was awarded the Artzone Art Award in 1999, was second in the 2007 Dunedin Art Awards and gained a merit in the 2011 North Otago Art Awards.
The New York exhibition opens on April 24, and will feature a selection of paintings from Devonport's Flagstaff Gallery.