The MAC address or Media Access Control Address is one of the most important identifying trait of any electronic device. It is actually a unique 12-digit identification number that serves a lot of purposes on the device.
Keeping all the information on your laptop secure is a big worry for people from all walks of life. To assuage this worry, most operating systems come with inbuilt encryption options for hard drive safety.
Apple allows it's users to send and receive text messages through it's Messages app on Mac. It uses your own phone number to send and receive these messages by syncing with your iPhone. However, this feature was locked for iPhone's until now.