The notion that Mac systems are immune to malware is just plain wrong. Sure, Macs might be less susceptible to malware than Windows-based PCs, but they are certainly not exempt from security threats. Proving otherwise, two different security outfits have put out warnings about separate threats targeting Mac users. One of them pertains to ransomware,

Source: Hot Hardware – Apple Macs Are Being Targeted By MacRansom ‘Malware As A Service’ Attacks