ScreenCaptureKit doesn`t work on winlogon

I try capture screen on wingon. For start app on winlogon i register LaunchAgent to start on LoginWindow. Application is started, but callback getShareableContentExcludingDesktopWindows newer called, and application just stuck.

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ecspertiza
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I’m not sure what “winlogon” is but…

If you’re trying to use ScreenCaptureKit from a pre-login context, that won’t work. I researched this earlier this year as part of a DTS incident and the end result is that ScreenCaptureKit is not currently available to pre-login agents (FB12776922). If you need to record the screen in that environment, use a legacy API like CGDisplayStream.

If your product works in multiple environments — for example, a screen sharing program that runs as both a pre-login and a regular GUI agent — I recommend that you write two code paths:

  • Use ScreenCaptureKit in the regular case.

  • Use legacy APIs in the pre-login case.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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eskimo
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  • Yep, application work on pre-login context. I use CGDisplayStream now, but his depricated, and his can`t exclude window from capture. According to my research teamviewer somehow use ScreenCaptureKit on pre-login context.

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    ecspertiza

  • @ecspertiza do you have a source for that? It sounds like this might be a special permissions thing, where it only works if apple gives a developer the permission (much like USB forwarding)

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    FullCircleMonkey
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