Need help reverting to Factory

[Papabinbin]

Hello
I have a MacBook Pro 2017 Touch Bar. I let a friend use it and he put Open Core Legacy on it.
When he returned it I asked him to please put it back to original.
Well I have no idea what he did but I really need help.
I am now trying to get the disk back to original in Disk Utility and I am stumped as what to do.
See attached picture.
Any help on which to erase and what not to touch would be appreciated

 

[FreakinEurekan]

1. Boot while holding Command-Option-R. Let go when you see the Globe.
2. Open Disk Utility from the menu it boots to
3. In DU, View menu > Show All Devices
4. Select "Apple SSD"
5. Click Erase
6. Format = APFS; Name = whatever you want (Macintosh HD is traditional); Scheme = GUID Partition Map
7. Click Erase button to complete erase
8. Disk Utility menu > Quit Disk Utility
9. Reinstall macOS

 

[Papabinbin]

Thank You !!
Will that get rid of the Open Core stuff ???

 

[tonmischa]

Will that get rid of the Open Core stuff ???

Yes. The instructions that @FreakinEurekan gave are correct.
(I would add Step 10: reset the NVRAM - https://support.apple.com/de-de/102539 - but thats just a very minor thing.)
That will completely wipe your device: OCLP, all systems, all your data. Everything. After the reinstallation of macOS, you can (have to) start from scratch setting up your Mac.

Makee sure to have backups of the stuff you dont want to lose.

 

[Fishrrman]

"Will that get rid of the Open Core stuff ???"

Do exactly as he says, and it will.

Remember...
You must boot to INTERNET recovery
and
You must choose "show all devices" from the view menu in disk utility.

 

[Papabinbin]

Ok great !!! Thanks so much guys !!!!

 

[Papabinbin]

Sorry to be a pain guys
Do I reset the NVRAM before the erase or after ??

 

[tonmischa]

Do I reset the NVRAM before the erase or after ??

After the re-install of the macOS.
It is just a precaution, in case the OCLP system wrote something unusual in the NVRAM.

Quote from https://dortania.github.io/OpenCore-Legacy-Patcher/UNINSTALL.html

Once finished, restart once more and Reset NVRAM to ensure a fully clean and stock system.

 

[Papabinbin]

Here we go !!
Appreciate all the help !!!!

 

[Papabinbin]

Want to thank you all very much !!
Mac is back to normal and running great !!
Again Thanks so Much !!!!