it looks like it may be a form of scab. if it is the flesh underneath will be fine.
They may be ripe and you can pick them before they fall. take hold of an apple lift it slightly and twist. if it comes off in your hand it is ripe. that way you wont get bruised apples. :o)

I've tried the larger ones daily but they aren't budging yet :-)

I thought it maybe something like scab.

mine have a little bit on some of the apples. I just peel it off or eat it. it wont hurt us.

Thanks.They'll go into the crumbles then :-)