thx in advance for help.

Mark in MN

Check out the site I attached here. I'd say it's coddling moth damage.

Then please post an image of the cut surface.

Looking at the sting I have to say "codling moth"- looks exactly like what I see in cm damage on my tree. As Jean says, cut into it. You should see the entry/exit paths and the trail of frass. It's often worth your trouble to cut around it, but sometimes the apples are ruined.

Nice looking apples, by the way- much the same color as my Liberties, which, by the way, are real codling moth magnets.

Well that one is a dud as far as codling moth goes. Codling moth typically bores into the center of the apple and makes a mess of the core. As has been suggested, the damage can often be trimmed out. Excellent images in the link posted by mamuang.

This particular apple may be an example of a codling moth that failed in its task.
Or it may be a different kind of pest.
May need to cut into more apples to know.

If you look at the website I attached re. Post Harvest Insect Damage above, The damage on Mark's apple looks like the one on Figure 3 of coddling moth damage, the unsuccessful ones.

Not all of the CM's entries are through stems (many but not all). I had that kind of damage on my apples, too.

Thanks. I should have checked out the link to begin with- nice photos.

Maybe I just ignored those tiny injuries in the past and they actually occur on fruit where I manage trees.

I like the fact sheet a lot. It answers a few questions of apple damages I have but too lazy to ask. To me, it's one of the links to keep.