Ripen the mango in a paper bag or newspaper. Leave the bag of mangos on the kitchen counter overnight and check for ripeness in the morning. Mangos wrapped in a paper bag will release ethylene, which is an odourless gas that speeds up the ripening process.[1] Remove and use the mango when it gives off a fruity scent and yields to soft pressure, usually about a day (or less).
When wrapping mangos in a paper bag or newspaper, be sure not to close the bag completely. Some air and gas needs to escape or mold and mildew might start to form.[2]
Add an apple or banana to the bag to speed up the ripening even more. Adding more ethylene-emitting fruits will increase the ethylene in the bag, giving you an even juicier mango all the quicker.