Mac OS X is already secure enough, and still we could do something to make it more secure. If you’ve just installed Mac OS X 10.9, you can also use the tips below to set up your new Mac OS X.
1. Disable Java in Your Browser
Most Mac users, Java, a plug-in used by some web applications, is of no use. Since it’s also responsible for a huge number of Mac security exploits, most of us are better off just disabling it. For different browsers, the steps are different:
Safari: Go to Preferences > Security and uncheck the box next to “Enable Java”
Firefox: In the menu bar, go to Tools > Add-ons > Plugins and click the Disable button next to Java.
Chrome: Enter chrome://plugins/ in the URL bar and click the Disable link under Java.
2. Disable “Open safe files”
If you’re a Safari user, you can set to make downloaded files open automatically, which is convenient and risky to your computer data. It’s highly recommended that you go to safe route and disable this by going to Safari Preferences > General. Uncheck the box next to “Open ‘safe’ files after downloading.”
3. Enable OS X’s Firewall
Mac OS X has had a built-in firewall for several years, but it will not be turned on by default. The Firewall allows users to control a Mac’s network connections on a per-application basis, which helps block unwanted programs from gaining access. If you’re running 10.5 Leopard or later, the Firewall can be configured by going to System Preferences > Security > Firewall.
4. Enable Find My Mac
You’ve probably used the built-in device-finder function for other iOS devices like iPhone. With this feature you can check to see if you left your iPhone at work (or in a bar). This feature is available on Mac as well, as long as you tie the system into your Apple ID. To enable Find my Mac, you should go to: Preferences > iCloud > log in > Use Find My Mac.
5. Install all software updates
Some users get annoyed by constant notifications to update their software. It may be tempting, but these updates are almost good. They include bug fixes and plug security holes that hackers may exploit to gain access to our systems.
Mac OS X users can go to Apple menu > Software Update. If you’re running 10.8 Mountain Lion or later, all your Mac App Store apps could get updated here. For other third party applications, it’s a good idea to enable automatic updates inside those apps, if it’s something the developer offers. Usually, the update will fix some bugs and vulnerabilities of the software.