Will the MacBook fill the random spaces in a password

Grant Bennet-Alder wrote:

<< some web browser/device will remember it, and that's supposed to be a security problem. >>

if your Mac remembers it, a password will be added to the browser keychain, and the browser-remembered keychain items are part of a larger encrypted set that are further encrypted when added to the system keychain. That is NOT a high security risk.

If the remembered password cannot fill random spaces as shown in OP, saving it in system keychain is useless. There are few organisations, such as banks that use random spaces to fill to open whatever that's behind it. Giving the full password won't open that encrypted page anyway, you have to fill those random opened spaces with corresponding characters. Every time you try to log in, it will have random spaces open to fill, and it can be any number. Looks like those randomly opened spaces can only be filled by a living person.

John Galt wrote:

I've not come across a website that needs it yet. Hopefully I won't. It looks hideous. Apple has definitively stated Passkeys are the future:

Anything else will eventually be swept into the dustbin of bad computing ideas.

It is not a website "requirement", it is how banks give you an option to fill in randomly open boxes. It is security matter. Of course, one can opt for the whole 20 character password to be inserted, and that Safari/macOS/any other web browser would remember and would insert with Touch ID. But then some web browser/device will remember it, and that's supposed to be a security problem. If browsers, OSs can't fill random slots, then it is great!.