Here’s a bit of disturbing news: the top-grossing utility app in the Mac App Store was stealing users’ Web browsing histories. The app, Adware Doctor, managed to sneak past not only  Apple’s app review process but also macOS’s sandboxing protections to steal and upload browser histories from Chrome, Firefox, and Safari to servers in China. To add insult to injury, the developers charged $4.99 for the app, which promised to “keep your Mac safe.” Apple has pulled Adware Doctor from the Mac App Store, but if you encounter it on a Mac, delete it with prejudice.

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