What this attack exposed is that platforms can be undermined, and while Macs (and Apple’s other products) are — unlike others — secure by design, that doesn’t mean they are infallible.
The introduction of Lockdown Mode demonstrates that Apple knows attacks happen. Within that context, it becomes super-important to ensure every user understands that if software they usually pay for is available free somewhere, they should absolutely avoid installing it. And they should always ensure that legitimate software (such as Chrome) is installed from the original source.
That’s not a problem if you stay within trusted app distribution ecosystems, of course — particularly Apple’s own heavily-policed app stores. But as the company is forced to open up to third-party distribution, that security will be eroded as, at least in some cases, some app developers insist on independent distribution of their software.
