A malware called Mokes. A can take screenshots from a computer every
30 seconds. It also can access photos, videos and documents on the computer. The article suggests that malware for Mac computers is becoming slightly more prominent, especially after the release of ransom ware earlier this year on Mac computers.
Source: http://www.telegraph.co.uk/technology/2016/09/09/apple-mac-virus-can-take-screenshots-and-see-everything-you-type/
