Add the mango slices and Tajin seasoning to a bowl and toss to coat.
Arrange the mango in a single layer in the air fryer basket (no oil needed) and set your air fryer to 135F degrees for 6 hours. (Start checking for doneness after 4 hours).
The mango is done when it's no longer sticky to the touch and feels slightly firm on the outside. It won't be crunchy.
Let cool and store in an airtight container or sealable bag.
Notes
Make sure your air fryer can go as low as 135F degrees or has a dehydrating function. Some air fryers do not have a temperature setting low enough to dehydrate food.
For the best results, make sure your mango is fresh and ripe. This will result in the best flavor (not bitter, sour or too sweet) and extend the life of your dried mango.
If your mango is a little soft and juicy, it might be difficult to cut, so just be careful with the knife.
An extra juicy mango also means the air fryer will need to draw more moisture out, so it may take longer to dehydrate.
Don’t overcrowd the air fryer. You want air to circulate around the mango slices so keep them in a single layer.
The thinner the slices, the quicker the mango will dehydrate. To make sure all the pieces dehydrate at the same rate, cut the mango pieces roughly the same thickness.
Make sure the mango is fully dehydrated before storing it. Any moisture left may cause bacteria or mold to grow. So, if you’re in doubt, just leave it in the air fryer a little longer.