Hours before Apple was supposed to launch its new macOS version — codenamed High Sierra (10.13) — Patrick Wardle, a well-known Apple security researcher, former NSA hacker, and Chief Security Researcher at Synack, published a video demonstrating a zero-day exploit in the company’s upcoming OS. […]

from https://www.bleepingcomputer.com/news/software/zero-day-demoed-hours-before-official-macos-high-sierra-launch/