Every Mac comes with plenty of free software, but it’s likely you’ll want to install additional programs on your Mac. Installing software on a Mac might seem straightforward, but you need to be aware of several issues.
First, most newer Mac computers don’t have a DVD drive, which means you have to either get an external DVD drive or download a program from a web site.
Second, OS X tries to protect your Mac from malware (viruses, Trojan horses, spyware, etc.), so you can’t always install software from the Internet without going through additional steps.
Of course, once you install software, ...