when i try to upgrade my macbook from osx yosemite to big sur on the app store, it says that the apple id password is wrong, even though it isn't. i write the same password on everything else that requires apple id and it works
the macbook previously did have macos big sur installed, but my dad deleted it, along with everything else, before giving it to me
MacBook Pro 13″, OS X 10.10
It likely has your Dad’s AppleID attached to the license for Yosemite. That is what it is looking for.
Erasing the drive completely should have cleared that.
I don’t know what else it is looking for.
To remove Big Sur would required Use Disk Utility to erase an Intel-based Mac and then How to reinstall macOS then setting it up again under your own Apple ID.
Notation - the Reinstallation would reinstall the version of macOS associated with the Recovery Volume.
Can't upgrade
