Macs are really no more secure than a PC, but for many years there just weren’t as many out there because of the expense of the hardware and other issues. They’ve historically been a much less popular choice among both consumers, enterprises, and hackers alike.
The PC attack surface is much wider; therefore, criminals develop malware that works on PCs because the payout is much higher. James Plouffe, lead solutions architect at mobile-security company MobileIron, said there are, however, a couple of oft-overlooked things that also protect Macs.
First, Plouffe said, “MacOS is actually BSD Unix derivative. Granted, it’s heavily customized but this meant that, unlike Windows (which had a long tail of viruses reaching back to the days of MS-DOS), bad actors had a lot more heavy lifting to do to be able to attack macOS.”
Source: NW Security 1