http://wccftech.com/macos-high-sierra-security-data-collection/

Apple’s latest macOS High Sierra brings a number of new features, but is also creating a lot of issues in terms of security and user privacy. We have already seen a critical security flaw discovered by an ex-NSA hacker that enables attackers to steal plain-text passwords stored in Keychain. It appears that the new operating system brings more than just a potential password exfiltrator.

macOS High Sierra also brings an update to the Safari browser that allows the Cupertino tech giant to collect more user data than it previously did. The company first introduced this feature of Differential Privacy at its Worldwide Developers Conference last year when it became part of iOS 10 for comparatively low-level applications (emoji, Notes, etc). Apple’s senior vice president of software engineering, Craig Federighi, had said at the time.