Anthropic's Claude Mythos is an AI that's so good at finding security flaws, the company opted not to release it publicly , instead giving access to a closed circle of security researchers and large organizations. Now, we're getting first glimpses of just how powerful Mythos (currently available only to select partners, including Apple , as Claude Mythos Preview) can be. The Wall Street Journal reported that security researchers from a Palo Alto-based company called Calif used Mythos to find a crack in Apple's macOS. In a blog post shared by Calif on Thursday , the researchers called this the "first public macOS kernel memory corruption exploit on Apple M5," and explained, without going into all the technicalities, that the exploit can be used to give an unprivileged local user complete access to the device.…