The acting chief, William, proceeded to take revenge: firstly by raiding the lands of Rannoch and Appin which belonged to the MacGregors and MacDonalds of Glencoe.
This gave hope to their kinsman, John "Ruaidh", grandson of Alan mac Malcolm Beg, that he might become chief of the clan, which failing the issue of William and Lachlan, he would be entitled to receive.
They were followed by a party under Dougal Mor Mac Gillichallum and his son Ferquhard into Caithness, through Strathnaver, Assynt, Lochalsh, Abertarff, Strathspey, Strathdee and finally Glenesk where they were overtaken and "cut to pieces".
[2] During William's time as chief the family had received two important additions: In 1502, he had succeeded to the heritable right of Gellovie in Badenoch, which his father had obtained from George Gordon, 2nd Earl of Huntly in 1481.
[2][1] William had no legitimate children but did have two natural sons, one of whom, Donald Glas, was the ancestor of the Mackintosh of Strone cadet branch.