Easy and useful tips to help secure your Mac
It’s a good idea to secure your Mac from prying eyes.
I consider the following two tips to be 100% necessary if you’re either in a shared computing environment, or if you have a laptop, and I have repeated them here. Both of these can be done via the System Preferences with the Account pane and the Security pane, respectively.
Secure your Mac by requiring password upon wake from sleep or screensaver
1) Go to Apple Menu > System Preferences > Security
2) Click on General section
3) Enable password prompt to wake computer from sleep or screen saver, which is done by clicking the first checkbox
Securing User Accounts – Disable Automatic Login
1) Go to Apple Menu > System Preferences > Accounts
2) Click on the Lock to make changes
3) Choose Login Options
4) Disable automatic login, so strangers will require password to access into your Mac
Seriously, set these passwords, it’s a good idea for so many reasons. Secure your Mac!

i’m glad you wrote this up because i did not know how to secure my mac previously and i always wanted to stop my roommates from using my mac when i am gone and the screensaver tip is the perfect solution. thanksss