Not sure how they can detect an agent driving a regular browser, I have built Cupertino to more efficiently let Claude drive my mac (https://cupertino.mgcrea.io) and it can drive a regular Safari exactly like I would.
They can't. Maybe they can today, but it's a cat-and-mouse game that heavily favors the agent.
How is Cupertino any different to AppleScript (and enabling AppleScript in chrome), out of curiosity?
They can look at things like the path the mouse takes, or the distribution in delays of actions.
Probably many other things too. But it's an arms race.