Oh, and the person you’re helping may be better served by either the dosdude Catalina patcher or the open core legacy patcher.
Walk through your process on these with someone who’s used them first before you just go off, if you don’t have access to another device running macos then you can “soft lock” yourself.
If you’re gonna work on macs it’s good idea to have one, even what the kids used to call a hackintosh.