[1] Kenneth (Ken) and Carl McGowen incorporated Mac's Milk Limited in Ontario on April 4, 1962.

In 1974, it bought thirteen Mini-Mart convenience stores in Vancouver from a subsidiary of George Weston Limited and seven Starlite Variety Stores operating in Windsor, Ontario.

Silcorp, the parent company of Mac's, acquired 163 Southern Ontario stores, and assets of rival Becker's in November 1996.

On April 14, 1999, Alimentation Couche-Tard Inc. purchased Silcorp (including the Mac's and Becker's chains).

The original mascot for Mac's was a cat named MacTavish (seen above), wearing a Tam o' shanter and a kilt, holding a jug of milk.