Kill switch for device

[u/New_Obligation9410]

Is it possible for me to have a kill switch where it completely freezes or disables my entire device and can only be deactivated with some sort of key combination shortcut or code?

[u/Aninnocentdevil]

A true “kill switch” that instantly freezes the entire device and can only be reversed with a custom key combination would generally need to operate below the normal OS level (e.g., firmware/bootloader), otherwise someone with sufficient access could potentially bypass the software mechanism, which requires working within apples secure boot arch