You know, if you've paid a large amount of cents for not-quite ready to eat fruit and it has been kept in a freezer - so hard to bite on, and not-quite ripe, still a little "green" - you can't eat it! Well here is something I discovered myself to fix this.
I have done this myself with nectarines, peaches and all kinds of pears.
Take the fridge-cold (or room-temperature) hard fruit and prick it right to the core or pit, about 4 or 5 times with a tooth pick (or meat skewer), then place in your microwave and do segments of 10 seconds, feeling it each time after it beeps until the fruit is room-temperature or just barely warm.
You can try a bite, and if it's not tasting good and ripe, do another 10 seconds, and keep going until it is yummy. (You can write down or remember the TIME it took from fridge-cold until edible - for my microwave, a nectarine takes 30 seconds, and then I can add the 10 sec. segments if needed).
I especially like nectarines, and there is no way you can eat them straight from the store without doing this, but then, YUM!