4 Take Advantage of Keychain
You should be using strong, unique passwords for each of your online services, financial institutions, and other user accounts. But it can get tricky to keep track of all of these individual passwords, which is why a password manager is an indispensable tool.
You might not know that Mac devices actually have a password manager baked into them. It’s called Keychain, and it actually works extremely well for being a lightweight and free piece of software. You can find Keychain Access in the Launchpad, or by searching for it in Spotlight.
On a similar note, be sure to use a strong password for any user accounts on your Mac with administrator-level access.