Macs and iCloud Hijacking
From February 2020
Ransomware, or viruses that hold your computer’s information for ransom, are far more common on Windows computers than Macs. However, there is a threat to a Mac that doesn’t require directly encrypting or stealing the computer’s files. iCloud hijacking is when someone reuses a password from a breached website to access iCloud and remotely lock a Mac computer or other Apple device. They then demand money for access to your device. To prevent this, we recommend using two-factor verification for Apple ID.
This makes it so your password and access to one of your devices is required to access you Apple ID. For more information on two-factor verification or on Macs and ransomware, click on the links below:
Two-Factor Authorization Apple Support
Macworld on Macs and Ransomware