If you use OS X, you probably have perused its security preferences 
on several occasions. These preferences are fairly straightforward, but 
there are some notable features about them that merit further 
exploration.
System security should always be one of a user’s primary concerns. 
We’re not just talking about strong passwords and firewalls, there are 
other considerations that you want to make such as encrypting your hard 
drive, which services can poll your location, and what apps you can 
install.
The range of security concerns on modern systems is fairly vast and 
wide, thankfully most operating system makers have developed ways to 
make it pretty easy and painless to users. Android for example, has 
refined how its notifications display so you can hide sensitive notification content on your lock screen. Meanwhile, iPhone and iPad users can effortlessly unlock their devices with any of their fingerprints.