1. On Mac
– go to google and Search which version of Os File you want to install on Apple Store by google
Download link :- High-sierra :- https://apps.apple.com/us/app/macos-high-sierra/id1246284741?mt=12
Download it (Not yo download it your mac most have latest updated Os Version)
– Go to Disk Utility- Erase Pendrive (Name:MyVolume Format : Mac OS Extended Journaled)
– go to this link : https://support.apple.com/en-us/HT201372
copy the code for your Os Version
-Open Terminal – Past code with your Pendrive Name
And Run