How To Update macOS to Latest macOS macBook Mid 2012 10.8.5 to 10.11.6

Download macOS X El Capitan
support.apple.com/en-us/HT206886
More Links To Download All Mac OS
mrmacintosh.com/how-to-download-macos-catalina-…

1 – macOS Big Sur 11.0

apps.apple.com/us/app/macos-big-sur/id152687813…

2 – macOS Catalina 10.15

apps.apple.com/us/app/macos-catalina/id14668413…

3 – macOS Mojave 10.14

apps.apple.com/us/app/macos-mojave/id1398502828

4 – macOS High Sierra 10.13

itunes.apple.com/us/app/macos-high-sierra/id124…

5 - Mac OS 10.15.7

support.apple.com/kb/DL2052?locale=en_US

6 - Mac OS Big Sur

apple.com/macos/big-sur/

support.apple.com/en-us/HT211683
Download Any From 10.10 To 10.15 MacOs

It takes time to download and install macOS, so make sure that you're plugged into AC power and have a reliable internet connection.
These installers from the App Store open automatically after you download them:
macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion
Your web browser downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.
macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
OS X Yosemite 10.10 can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard



So Basically if you factory reset your MacBook 2012 then you will go back to older operating system near by 10.8 if you got 10.9 you are lucky
but for latest operating system required 10.9 or later
so have to go by these steps
first update to 10.11.6 then update to 10.15.1

from 10.11.6 to 1o.15.1 watch this video
youtu.be/iQEwF_SyJrE


i will do one more step after everything done just create backup before doing anything for future help
thanks for visiting