I suspect they're referring to changes to Gatekeeper in recent macOS versions: https://arstechnica.com/gadgets/2024/08/macos-15-sequoia-makes-you-jump-through-m

I suspect they're referring to changes to Gatekeeper in recent macOS versions: https://arstechnica.com/gadgets/2024/08/macos-15-sequoia-makes-you-jump-through-more-hoops-to-disable-gatekeeper-app-checks/ https://arstechnica.com/gadgets/2024/08/macos-15-sequoia-mak... It used to be that you could run any third-party application you downloaded. And then for a while you'd have to right-click and select Open the first time you ran an application you'd downloaded, and then click through a confirmation prompt. And macOS 15, you have to attempt to open the application, be told it is unsafe, and then manually approve it via system settings.