Macintyre was born in High Street, Glasgow. His father was a tailor. His mother was related to the missionary and explorer
David Livingstone. Macintyre originally trained as an electrical engineer and worked as an apprentice electrician before enrolling to the
University of Glasgow in 1878. There he changed his field for medicine and graduated in 1882 with the
Bachelor of Medicine degree. He then worked as a
naval surgeon in London, Paris and Vienna, and returned to Glasgow to assume a position of a Surgeon for Diseases of the Throat at Anderson's College Dispensary. He later established a private practice specialising in the treatment of singers and actors. Macintyre is mostly known for applying his electrical engineering knowledge to medicine. In 1885 he became Consulting Medical Electrician at Glasgow Royal Infirmary where he established a "department for the application of medical electricity" in 1887. In 1893 he became President of the British Laryngological Society. In 1895 he was elected a Fellow of the
Royal Society of Edinburgh. His proposers were
John Gray McKendrick,
James Thomson Bottomley,
Magnus Maclean and
William Jack. Late in 1895,
X-rays were discovered by
Wilhelm Röntgen. On 5 February 1896
James Thomson Bottomley asked McIntyre to demonstrate an x-ray machine created by his uncle,
William Thomson, Lord Kelvin following instructions from Rontgen (Lord Kelvin was ill and could not attend). The demonstration took place at Glasgow Royal Infirmary and was the first use of x-rays in Scotland. All Scottish hospitals introduced x-ray machines within the next 12 months. He was also President of the West of Scotland Branch of the
British Medical Association, Corresponding Fellow of the American and French Laryngological Associations, Fellow of the
Royal Society of Edinburgh and of the
Royal Microscopical Society, among other posts. He died on 29 October 1928. ==Family==