The app claims to prevent “malware and malicious files from infecting your Mac,” and it offers the ability to remove adware that is already on your system. But according to Wardle, once the app has been downloaded, it asks for high-level access to your system files and begins a process of working around Apple’s normal “sandboxing” protections. Apple is known for having a strict vetting process for what’s allowed in its App Store, and apps are typically separated from each other and the operating system. But according to Wardle, Adware Doctor uses some workarounds to gather a user’s browser history...