MacOS before El Capitan? Read on.

[cellio]

According to this Gizmodo article, if your version of MacOS predates El Capitan (10.11, though the article says 10.9), a Chrome update might have broken your file system, preventing your machine from booting. Yikes! The article has more information and steps to recover. (I'm running Sierra so I haven't verified the claims or the recovery steps.)

Comments

[goljerp]

Even worse, if you're running a more recent version of MacOS and have turned off SIP, then you'll also have this problem. (If one doesn't know what SIP is, it's on.) (Why would one want to turn *off* SIP? Well, it's System Integrity Protection, and it locks down bits of the operating system. Which is nice, unless one needs older sofware to run which requires access to said locked down bits. No, sudo doesn't work for those bits when SIP is on...)