Where is admin password on Macbook?

The admin password is usually the same password you use when you login to your Mac.

When you first setup the computer, the user account that gets created IS an admin account. Of course this may change if you create other user accounts and change things around.

The admin password is not to be found listed anywhere on the computer.

If you don't know the admin password or have forgotten it, you may be able to reset it.

For guidance on how to reset your login password, first please see:

If you forgot your Mac login password - Apple Support

Grant Bennet-Alder wrote:

The admin password is not stored "in the clear" on your computer AT ALL. Only the fully encrypted version is stored, and there is no decryption key. The admin password can not be 'discovered' or 'retrieved' by any means.

Some terminology: the macOS login (or admin) password is not encrypted.

Given the appropriate key, encryption algorithms can be reversed and decrypted, and the original data revealed.

The password is instead cryptographically hashed, which is a one-way operation; an algorithm that cannot be reversed.

Somewhat unusually among computing-related algorithms, a properly-designed password hash is also intentionally very resource-inefficient, in an attempt to make brute-force efforts that much more difficult and expensive.

Any time a candidate password needs to be tested, it too is hashed using the same one-way hashing function, and the hash is then compared against the saved password hash.

But the intended point of Grant Bennet-Alder’s reply is entirely correct. The login password is not saved anywhere. Not in cleartext, and not even encrypted.

The admin password is not stored "in the clear" on your computer AT ALL. Only the fully encrypted version is stored, and there is no decryption key. The admin password can not be 'discovered' or 'retrieved' by any means.

The only thing your Mac can tell you, after you have entered a proposed password, and it has been encrypted using the same algorithm as usual is, "was that it" ?

Your Mac does not even know how long the password is.

Thanks for that clarification!