> If you had enabled Find My Mac on a T2 equipped mac, factory reset WON'T unlock the device.

I don’t think that’s true, I’ve never had to do that, and this is not a part of Apple’s documented reset process for resale of a machine. If you are the device’s actual owner and you use the simple process Apple outlines, it will reset it for a new owner, period.

At the time I bought, the documented process included "manually disassociate FMM from the device in iCloud settings"... except it wasn't well propagated information and the previous owner and reseller just tried factory reset.

Been there, went with Apple support over it, the only reason I still don't have it unlocked is because I didn't have time or energy to redo the whole setup. Might redo the apple-driven unlock process, but the hw is not worth it really.

EDIT: Apparently the nice simpler procedure that does wipe FMM only arrived in Monterey.

"Erase All Contents and Settings" is the only button you need to push on a T2 (or later) Mac, and it is the factory reset button. It will unlock the device.

Your information is outdated.

I have physical proof on my hands. It's possible that they fixed it in later version of the OS, but factory reset is what the reseller did with previous owner, and it did not wipe FMM registration, leaving the laptop half-stuck in terms of ownership - I only figured it out trying to register FMM to myself.

I assume things were harder in older versions of macOS, but you can read step 2 yourself: https://support.apple.com/en-us/HT201065

Any T2 Mac or newer requires only that button to be pressed, and then click through the wizard to complete the process.

You can also read this document: https://support.apple.com/en-us/HT208987

"Other ways to disable Activation Lock"

"Activation Lock is disabled when you use the Erase All Content and Settings feature."

which confirms the same thing. The experience that people have is very simple these days.

Yeah, this was fixed, supposedly, on Monterey.

Which still leaves considerable amount of laptops with broken FMM registrations in T2. Especially since it was upgrading to Catalina, iirc, that started problems.