Wear plastic or rubber gloves if sensitive to green mango. Peel, slice and discard pits.
Place slices in hot light or medium syrup, bring to a boil and cook 2 minutes.
Fill hot jars with fruit and boiling syrup, leaving 1/2-inch headspace; remove bubbles and apply lids.
Process pints 15/20/20/25 minutes and quarts 20/25/30/35 minutes at 0–1,000/1,001–3,000/3,001–6,000/above 6,000 ft.