MacLachlan achieved fame as a stage singer of Gaelic song. She performed for
Queen Victoria, at
Balmoral Castle in 1892. She toured extensively. She shared a bill with singer
Harry Lauder and violinist Mackenzie Murdoch on a Scottish tour. She toured in
North America in 1901; while in Canada, she sang with a teenaged
Henry Burr, at the Opera House in
Saint John. In 1902, she sang at the Scottish Concert of the London Inverness-shire Association, to raise funds for Scottish scholarships and a "Home Club for Highland Lads" in London. In 1905 she sang at a
Burns Monument Fund benefit concert in
Boston. She performed in
New Zealand in 1905 and again in 1907. During her North American tour, MacLachlan was celebrated in newspapers and helped to increase the popularity of Gaelic song there. "Whether it is crooning a Highland cradle song, or a call to the clans to take up arms, she is equally successful", observed one New Zealand reviewer in 1907, about her repertoire. In September 1899, MacLachlan made the first commercial
gramophone recordings of Gaelic song, performing "" ('Ho-ro my Beautiful Brown Maiden') and "" ('My Home') to piano accompaniment. She made further recordings in England in 1903. In October 2024, it was announced there would be a tribute to MacLachlan at the Royal National Mòd in November 2024. == Personal life ==