It's certainly not too late to start a hive, but it is too late to buy the bees, which typically requires being on a waiting list since January. That's expensive anyway, so you could hope to get lucky and find someone selling or splitting a colony, or capture a swarm.

BUT, as worrisome as no bees is, I would still question whether that was your problem here... remember that bees, and especially honeybees, are NOT the only pollinators of fruit trees. The best fruit set I have seen in 10 years in my area coincided with a miller moth population explosion -- the moths were swarming all day and night over every blossom they could find, and I have no doubt that they took care of the pollination that year!

A note about Apricot pollination: honeybees are rarely active when these flower, and the weather is usually marginal for them to get much pollination done, but Apricots typically over crop anyway. I don't actually know what does most of the pollination, but I doubt it is principally bees, at least in my area. The real threat to all the common fruits here is late spring frosts.

I ordered a new batch of mason bees this spring, but I've seen very little activity from them. Either they died or went Elsewhere.

My apples only had a few dozen clusters, and although there were plenty of flowers on the crabs and one tree of my neighbor's, there were apparently not enough to attract any bees. I went out today and found most of the clusters had aready dropped all their potential fruitlets, unpollinated.

The pears, flowering abundantly, were pollinated by something, if not bees. I've read that pear flowers aren't very attractive to bees.

I heard on the news a couple of weeks ago that most of Ohio's bees are gone due to Bee Colony Colapse disease. We had lots of blooms on our apple trees but ... I think it's going to be a bad year for fruits and veggies this year :^(

Here in Madison, Wisconsin, we are having an OK year for bee pollination, on the blueberry flowers. We have two different kinds of digger bees, that live in the ground. I think they are genus Andrena. We also have bumblebees, and someone in the neighborhood has honeybees, because I am seeing them as well. I go to considerable length to keep the bees happy-there is no insecticide used here, and no herbicides, either. We have a some native flowers, and these were chosen so there would be something flowering throughout the growing season. Last year we had week after week of cold and overcast weather and the bees were scarce. Pollination was not complete, and we harvested about 1/3 of what was expected. So far, this year looks better.

This year, here, the weather was constantly cold and overcast, and the bees, what bees there were, rarely came out.

As a bee keeper I share your pain, believe me.
I am fortunate I don't live in a area where they use any Nionicatinoids (sp) so I do manage to keep my hives going.
I do notice this year, in spite of the terrible winter, a resurgence of local pollinators, especially Bumble bees, so my blue berries have had a real going over.