Starting with iOS 17 and watchOS 10, enabling Lockdown Mode on an iPhone also turns on Lockdown Mode on a paired Apple Watch. Apple says Lockdown Mode provides an "extreme" level of security, with strict limitations on apps, websites, and features.
At launch, Lockdown Mode included the following protections:
- In the Messages app, most message attachment types other than images are blocked, and some features like link previews are unavailable.
- Incoming FaceTime calls from people you have not previously called are blocked. Incoming invitations for other Apple services from people you have not previously invited are also blocked.
- In Safari and other WebKit browsers, some complex web technologies and browsing features, including just-in-time (JIT) JavaScript compilation, are disabled unless the user excludes a trusted site from Lockdown Mode.
- Shared albums are removed in the Photos app, and shared album invitations are blocked.
- When a device is locked, wired connections with other devices/accessories are blocked.
- Configuration profiles cannot be installed, and the device cannot enroll into mobile device management (MDM), while Lockdown Mode is turned on.
In a press release last week, Apple said it is expanding Lockdown Mode's protections to encompass "safer wireless connectivity defaults, media handling, media sharing defaults, sandboxing, and network security optimizations."
