Thank you for your response. Here are two photos showing the tree. As you can see, it is quite large, and growing larger every year.

Maybe I should put a leg of some kind somewhere along the trunk.

Might be on a fully dwarfing root-stock in which case it will need substantial permanent support.

Thank you... Would I need to pad the vertical brace I will add to support the trunk ?

Yes put a vertical brace underneath, say a 4x4 post. You could use an old towel to pad the top of the post. Maybe shape the top to fit the limb.

Wedge the post under there tight and possibly put a pad underneath if you think the post might sink during wet weather.

I'm insane and like hard work, I'd dig it up and fix it.

but no sane person would.

how I'd do it, dig a big deep circle around it. Dig up to the trunk a few (3-4) times from the circle. Put garden hose in the hole. Let water run until the tree falls over completely. Once the dirt is turned into mud and the tree falls over (might take more digging) drive some 4x4's in the ground and ratchet strap the tree to make it stand up. Stop the flow of water and replace the dirt you dug up.

You should save most roots.

But it's only worth the weekend of effort if you care about having a tree that stands straight up.

Or get drunk enough that you lean the same as the tree.

Pip313 I'll try the brace first, I think!

Actually, I like the lean of the trunk. My concern is not losing the tree. The apples are large and delicious.

In that case do you know the cultivair?

if not start a new rootstock and graft to it just in case the worst happens in a year or ten.

I am 78, so I don't worry too much about what will happen in 10 years! Que sera sera...

There are lots of 'seedlings' growing under the tree. Maybe I should let some grow as a backup.

No, I don't know the cultivar. All I now is that the apples are large, juicy and sweet. The tree is loaded with them.

Oh. Yeah that makes a difference

Pruning it to off load the weight might delay or slow the tipping

I am certainly planning to prune it in the Fall. The tree is taking over the yard.

Here are photos of the braces I installed today. I planted a spike at the base of the inclined support to keep it from sliding back, and I put a screw through the board and into the trunk at the top. What do you think?

As for the cultivar, I have no idea. Here is a photo of some of the apples. Can you tell the cultivar from the apples ?