[23rd December 2017]
Monica Chin’s article for Mashable – Here’s how to guard your Mac against ransomware – isn’t the general guide to self-protection that you might think from the title. It’s actually about a specific attack via iCloud, where attackers have gained access to account names and passwords and used them to lock them out of their devices.
If this happens to you, you’ll have to bring your computer into an Apple Store and verify your identity to regain access to it. Otherwise, the only ways to get back control of your machine is to perform a hard reset (which would mean losing all the data) or pay the hackers and pray.
The article is actually several months old, but I’m flagging it here because the same problem – or one very closely related – has crossed my radar recently.