Q:

If jailbreak is for iPhone then what is it for MacBook?

As we know we can jailbreak any iOS device to loosen the OS rules.
1 Is there anything similar to macOS devices also?
2 If Yes, then what is it?
3 Is it possible to do it from remote?
4 How can I do for preventing my MacBook from getting jailbroken?

A:

There is no need to. Administrator account is available. That is basically what you want with "jailbreak" on iOS.
EDIT: NoahL has a point about disabling SIP, forgot about that one. More info here http://www.howtogeek.com/230424/how-to-disable-system-integrity-protection-on-a-mac-and-why-you-shouldnt/

