The currency in Majorca is the Euro. It’s easy to get prepared for your trip by buying some Euros before you leave.
Euros are also available from banks, or Oficina de Cambio. Do a spot of research before you go, to be sure you’re getting the best exchange rate (so we advise against changing your money at the airport, where rates are lower and fees are higher), and remember to check commission fees. ATMs are plentiful in most established resorts, and are a convenient option. You may find using a pre-paid travel card as a way to avoid bank fees as well as meaning you don’t have to carry too much cash.