Q&A for How to Clear RAM on Mac

Sudo is the top administrative level on a Linux-based system such as a Mac. Typing in your password should not be running sudo. The sudoers file is a record of which users are allowed to run sudo, and all administrators should be on this list. I would recommend contacting Apple support, as this could be evidence of malware trying to gain administrative privileges.

Shut it down and do it again, or restart the whole thing.

Make sure you are in the Admin user. The terminal for older Macs may not let you use the terminal in an account besides the Admin one.

There is another way. Go into the activity monitor, and click Memory. Start manually stopping systems from using too much RAM.

Go to Settings in Mac. Then, click Users and Groups. Click the lock icon and enter the admin username and password. There is a button that says change password. Click that and you'll be all set.

You have to have a password. If you want, store passwords in notes. Lock the note to keep it private.

Just type in your password. The computer will not show the letters you type. Press enter when you’re done. Make sure you are in an account with sudo permissions.

It's to prevent other people from looking. Type your password, and then click enter and it should work.