FB21253528: QuickTime shows frozen preview when connected iPhone is locked, no indication content is stale #734
Description
Submission Date
2025-12-03
Status
Open
Area
QuickTime Player
Operating System Version
macOS 26.2
Type
Incorrect/Unexpected Behavior
Description
When recording or previewing an iPhone screen in QuickTime, locking the iPhone causes the preview to freeze on the last frame. There is no indication that the preview is stale---it appears as though the device is simply displaying static content.
Steps to Reproduce:
- Connect an iPhone to a Mac via USB
- Open QuickTime Player > File > New Movie Recording
- Select the iPhone as the camera source
- Observe the live preview
- Lock the iPhone
Expected Behavior: QuickTime should indicate the device is locked or unavailable — either via a black preview, an overlay message ("iPhone Locked"), or by stopping the preview.
Actual Behavior: The preview freezes on the last frame. No indication is shown. If recording, the recording continues capturing the frozen frame indefinitely.
See also: FB21253535
Keywords
AVCaptureDevice, iOS screen capture, kCMIOHardwarePropertyAllowScreenCaptureDevices
Prerequisites
- The title follows the format
FB<number>: <title> - I will keep this issue updated with Apple's responses