https://www.vice.com/en_us/article/93bw8y/google-caught-hackers-using-a-mac-zero-day-against-hong-kong-users

Google researchers caught hackers targeting users in Hong Kong exploiting what were at the time unknown vulnerabilities in Apple’s Mac operating system. According to the researchers, the attacks have the hallmarks of government-backed hackers. 

On Thursday, Google’s Threat Analysis Group (TAG), the company’s elite team of hacker hunters, published a report detailing the hacking campaign. The researchers didn’t go as far as pointing the finger at a specific hacking group or country, but they said it was “a well resourced group, likely state backed.”