# Device Lock Remotely and immediately lock a device. ## Discussion You can display a message and phone number on the Lock Screen if the user has set a passcode for the device, it isn’t a Shared iPad, and it isn’t in Lost Mode. In macOS, this command uses the Find My framework to lock a device, and fails if there’s no recovery partition on the device. > Warning: > Sending this command to a Mac with Apple silicon running a version of macOS before 11.5 deactivates the Mac. To reactivate that Mac, it needs a network connection and authentication by a local administrator with Secure Token enabled. Refer to the following sections to determine supported channels and requirements, and to see an example request and response. ### Command availability ||| |--------------------------|------------------------------------------| |Device channel |iOS, macOS, Shared iPad, visionOS, watchOS| |User channel |N/A | |Requires supervision |macOS | |Allowed in user enrollment|iOS, visionOS | |Required access right |AllowPasscodeRemovalAndLock | ### Example request and response **Request:** ```plist Command Message Lock Message PhoneNumber 408-555-5555 RequestType DeviceLock CommandUUID 0001_DeviceLock ``` **Response:** ```plist CommandUUID 0001_DeviceLock MessageResult Success Status Acknowledged UDID 00008020-000915083C80012E ``` ## Topics ### Commands and responses [`DeviceLockCommand`](/documentation/DeviceManagement/DeviceLockCommand) The command to remotely and immediately lock a device. [`DeviceLockResponse`](/documentation/DeviceManagement/DeviceLockResponse) A response from the device after it processes the command to remotely and immediately lock a device. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)