After she lost her usefulness as a fire tug, she was sold in 1930 to the Owen Sound Transportation Company Limited. At that time she was taken to the Georgian Bay Shipbuilding Company at Midland for conversion into a combination package freighter and passenger ferry and from a steamer to a diesel powered vessel.
In 1931 the vessel was renamed the Normac which was the namesake of captain "Norman Mckay," founder and general manager of Owen Sound Transportation Company Limited, which is still running today. Mckay was the captain of the company flagship SS Manitoulin.
The Normac sailed the Owen Sound to Sault Ste. Marie route via Killarney and the North Channel, commencing July 16, 1931. From 1932 she sailed the Manitoulin Island - Tobermory route and in later years, along this same route with the S.S. Norisle. After the SS Norgoma was converted to diesel fuel and placed on the Tobermory run, in 1964 the Normac took up the role as an automobile ferry across the North Channel from Meldrum Bay to Blind River and Cockburn Island, a portion of its original run from Owen Sound. Normac remained on this route until the close of the 1968 season when she was retired. She was sold to Donald F. Lee of Port Lambton Ontario, and moved from Owen Sound to Wallaceburg Ontario, where she spent the winter.
She was then sold in 1969, to John Letnik, and was converted into Captain John's Harbour Boat Restaurant, a floating restaurant in Toronto Harbour. The Normac arrived at Toronto in her Owen Sound colours, and was soon painted all white. Shortly afterward the steel hull was repainted bright red, to make it more noticeable from the street. Permanently moored at the foot of Yonge Street, she was severely damaged in 1981 when the Toronto Island ferry Trillium struck her, causing a slow leak and her sinking two weeks later.
The Normac was raised in 1986 and refurbished to serve as a floating restaurant in other communities. With her amidships state rooms removed, she served as Tokyo Joe's Marina Bar and Grill, a floating restaurant and cocktail lounge at Port Dalhousie, Ontario until she was gutted by fire in 2011. She was restored and became the Riverboat Mexican Grill.
- "Burned boat has roots here". Owen Sound Sun Times. December 29, 2011. Retrieved May 28, 2015.
- "Captain John's boat leaves watery grave". Maritime History of the Great Lakes. 1986-06-15. Retrieved 2012-03-22.
- "Captain John's Restaurant sinks". Heritage Toronto. 2008-10-06. Archived from the original on 2012-03-27. Retrieved 2012-03-22.
- "Archived copy". Archived from the original on 2016-02-14. Retrieved 2017-03-08.