How to enter single user mode on Mac OS?

Question

macOS

Question to the owners of poppies.
There is a macbook air 11, you need to enter single user mode in order to reset the user password according to this instruction.
I do as it is written here: support.apple.com/kb/HT1492?viewlocale=ru_RU
But I don't get any white text. Everything loads as usual.
Mac OS version is latest.
CHADNT?

Answer 1

Disabling Password Protection
1) Boot into the Open Firmware. (Command + Option + O + F)
2) Type "setenv security-mode none" and press return.
3) Enter in the password at the password request prompt and press return.
4) Then type "reset-all" to restart the computer.
Force Removing Password Protection
1) Add or remove DIMMs to change the total amount of RAM in the computer.
2) Then, the PRAM must be reset 3 times. (Command + Option + P + R).

Answer 2

The last one is Lion (10.7) or Snow Leo (10.6.8)?

Answer 3

If you hold down “alt” while loading, does it offer options from where to boot?