Mackenzie was born in
Edinburgh, the eldest son of Alexander Mackenzie and his wife, Jessie Watson
née Campbell. He was the fourth musician of his family. His great-grandfather was an army bandsman; his grandfather, John Mackenzie, was a violinist in Edinburgh and
Aberdeen; his father was also a violinist, the conductor of the orchestra in the Theatre Royal, Edinburgh, and editor of
The National Dance Music of Scotland. Mackenzie's musical talent emerged early: at the age of eight he was playing nightly in his father's orchestra. Shortly after starting at the Academy, he was awarded a King's Scholarship, the income from which Mackenzie augmented by playing in theatre and
music hall pit-bands, as well as in classical concerts under the leading conductor
Michael Costa. This sometimes caused him to neglect his academic work, and on one occasion, having failed to prepare a piece by a classical composer for a piano examination, he improvised, "starting off in A minor and taking care to end in the same key", and convinced the examiners that it was a little-known work by
Schubert. Recalling this prank in his old age, he added, "I have never ceased to wonder at my escape, and would certainly not advise any student to run a similar risk today." Mackenzie successfully began composing orchestral music. Bülow conducted his overture
Cervantes in 1879, Mackenzie was conductor of the
Royal Choral Society and the
Philharmonic Society Orchestra between 1892 and 1899, Both at the Academy and elsewhere, he was a popular lecturer. Among his topics were
Verdi's opera
Falstaff, the text of his lecture on which was later published in translation in Italy. In the late nineteenth and early twentieth centuries, Mackenzie's professional prominence brought him many honours from universities and learned societies in Britain and abroad. He was
knighted in 1895, and created a
Knight Commander of the Royal Victorian Order (KCVO) in 1922, the year of the centenary celebrations of the Royal Academy, in which he was the central figure. On 15 October 1923 the
BBC broadcast one of the earliest examples of a one-composer programme, devoting one hour and 45 minutes to performances of Mackenzie's works, conducted by the composer. On his eighty-sixth birthday, over forty distinguished musicians presented him with a silver tray inscribed with facsimiles of their signatures, including
Elgar,
Delius,
Ethel Smyth,
Edward German,
Henry Wood, and
Landon Ronald. He retired from the Academy and from public life in 1924. Mackenzie died in London in 1935 at the age of 87. ==Works==