Here are six tips to help you improve your Mac's security.
1. Upgrade to a version of OS X supported by Apple.
2. Use a login password.
3. Turn off automatic login.
4. Turn on FileVault.
5. Use external disk encryption.
6. Turn on Find My Mac.
For more, see the original article at the link below.
6 Easy Ways to Make Your Mac More Secure | Biz Tech