Sun exposure is required for red to develop.

Last year the leaves may have been so dense then apples remained green.

I suspect you have a multigrafted tree and alternate bearing.

You also may have picked the fruit prematurely last year. What was your signal that it was time to pick. I'm amazed at how many people arbitrarily choose when to pick ALL of the fruit on a tree and then complain about the quailty of the fruit.

It would never occur to me to do that.

Ripening times vary from year to year. This year where I live is several weeks ahead of last year.

Were the seeds brown when you picked the green apples last year? Did the apples come off easily? Were some mature apples dropping on the ground? Were the apples any good? Were they starchy?

If in doubt of what they are like ripe you may choose to leave some on until there are signs of being past ripe and then you will have seen the full development.

Since you moved in during the summer, the tree had probably been sprayed already, so you got good apples. This year you got the wormy things that result from no spray. That is what you will always get, unless you take preventive measures. I use ziplock bags, but end up with 75% of the apples on the ground, so need to rethink my plan of attack. Northwoodswis

North,

Could you figure out why so many of your apples dropped after bagging.

I suffered June drop for the first time this year. Out of 71 apples, 11 dropped after bagging. For me, I may have left too many. None of the dropped ones had any damage from bugs.

For me, bagging apple is the way to go. I am harvesting my William's Pride now. Perfect apples. I have some earwigs in some bags but no damage from them. My friends could not believe I only sprayed once before the apples were big enough to bag. They gladly ate my apples.