Now there's an interesting thread in the "kilt advice" section where there is posted a photo of the rear of an MOD MacDonald kilt. This kilt has very interesting pleating, the pleats alternating between two different locations along the sett.

I would assume that this kilt is a Nova Scotia Highlanders kilt, because I've not been able to find any reference to any other military unit wearing MacDonald tartan.

Which brought up a couple interesing points. When and why did the Nova Scotia Highlanders adopt MacDonald? Because according to Barnes none of the parent regiments wore that tartan:

Pictou Highlanders: MacKenzie
North Nova Scotia Highlanders: Murray of Atholl
Cape Breton Highlanders: Sutherland

These three regiments became the Nova Scotia Highlanders in 1954.

The other interesting thing is how common it was for Canadian military units to adopt civilian clan tartans.

The original Scottish Highland regiments all wore "Government tartan" at first (42nd Highlanders, 93rd Highlanders) or added overstripes to the Government sett (92nd Highlanders, 78th Highlanders) or invented a new tartan (79th Highlanders).

Australian and New Zealand regiments adopted preexisting Scottish military tartans (Black Watch, MacKenzie, Gordon).

But many Canadian regiments adopted clan tartans: Murray of Atholl, Davidson, MacGregor, Douglas, Campbell of Argyll, MacDonnell of Glengarry, Leslie, and MacGillivray.

So there must be loads of old MOD kilts floating around in Canada made from these clan tartans. I wonder what pleating style was used in each case.