What does option+command+control+shift+(,) do?

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Level 1

43 points

What does option+command+control+shift+(,) do?

I'm setting up some keyboard shortcuts for phoenix.app and everything is working great except for this keyboard shortcut. When quit phoenix (to be sure it's not the cause) and I hit this shortcut, the screen flashes as though I took a screenshot, but I don't see any new files, nor is there a screenshot in my clipboard.

I've looked through every single shortcut in system settings > keyboard > keyboard shortcuts (several times), and that shortcut isn't listed.

Also, I tried this shortcut on a friend's mac to see if it was something specific to my machine, but his does it too.

Any idea what it is or how I can figure it out?

Posted on Apr 13, 2023 12:43 PM

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Answer 1

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MrHoffman

Level 10

154,823 points

Apr 13, 2023 7:10 PM in response to saghi

For details of that shift-option-command-control-comma chord, launch Terminal.app and enter the following command:

man tailspin

Per that:

     tailspin configures the system to continuously sample callstacks of processes and select kdebug events in the kernel trace buffer. When tailspin data is recorded to a file,
     the tailspin file will contain information about the system state from about 20s prior to the save. The tailspind daemon is a helper daemon for the tailspin feature and
     should not be run manually.

Similarly, the shift-option-command-control-period chord triggers sysdiagnose. Details of that: