👉 A Mackintosh is a type of portable radio transmitter, which was introduced by Alexander Graham Bell in 1876. It was a cylindrical device with a small antenna at the top and was used to transmit sound signals over long distances using an electrical circuit. The first Mackintosh was made in England, but it wasn't widely adopted until the 1920s. Today, Mackintoshes are still popular for their unique design and practicality.