https://www.bleepingcomputer.com/news/security/evilquest-wiper-uses-ransomware-cover-to-steal-files-from-macs/

A new data wiper and info-stealer called EvilQuest is using ransomware as a decoy to steal files from macOS users. The  victims get infected after downloading trojanized installers of popular apps from torrent trackers.

While not common, ransomware has been known to target the macOS platform in the past, with KeRanger, FileCoder (aka Findzip), and Patcher being three other examples of malware designed to encrypt Mac systems.