Originally intended as a bomber, it was eventually produced for civilian use as well.

[1][2] The M.24 resembled a scaled-up version of earlier Macchi flying boat bombers such as the M.9 and M.18, sharing their biplane configuration and Warren truss-style interplane struts.

However, while these earlier aircraft were single-engine types, the M.24 had twin engines mounted in a tractor-pusher pair on struts in the interplane gap.

[1][2] Two M.24s made a demonstration flight in 1925 from Macchi's home on Lake Varese, crossing the Alps to Amsterdam, Copenhagen, Stockholm, Leningrad and home again.

This featured an enclosed cabin within the forward hull that could seat eight passengers.