well, its a possibilty but,
i am based in Australia, and the 2 brothers and 1 sister who came out here from Ireland started and ran a Cattle station(farm) called Greenvale sometime in the late 19th century.
so it's likely that they were literate and would have picked up on a mis-spelling.
also an online search of the Irish Golden pages telephone directories shows a number of Macale's listed
i am also told that a few years back, some people from Ireland came out to try to map the Australia branch of the Macale tree, but their Visa's ran out before the could get very far.
this might be a fruitless search, but something might turn up.

Thankyou
Dion Macale