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.