I put them in a brown paper bag with a banana and it worked! Only took about 36 hours and the avos were soft enough to slice- but a bit more time would have been required to soften them enough to mash. Great tip!
Recently, unorganised and anxious to keep a commitment to provide an avocado dip, after discovering they were not ripe, l was relieved to discover my microwave experiment worked successfully. Managed to get the first one cut up, after adding the lemon juice, and rather desperate, l put it in the Micro for 10 or 20 secs. lt worked!!!!!! So the next one, which l couldn't even peel, went in for 20 secs, whole. That also worked beautifully, and l received many compliments for my dip. Phewwww!