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So how does one go about doing this? As of yet, Google has turned up no useful answers for me, although I may yet get lucky.


This would need to be done using just the one Mac, not using a remote login, although using the Terminal in any fashion is well within my capabilities.

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up vote 3 down vote accepted

Try this: Grab 'impossible' screenshots

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Great article, but I've only got one Mac. :) – Abraham Vegh Jul 15 '09 at 10:05
On Windows you can use Putty to open a ssh connection to your Mac. – Simone Carletti Jul 15 '09 at 10:09
I know, but I'd like to see if it's doable using just the one. – Abraham Vegh Jul 15 '09 at 13:43

Go old school and whip out the trusty camera and optional tripod.

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+1 Hehehe remind me of: – OscarRyz Jul 15 '09 at 10:15

You can use Grab by using the 10-second delay option, then putting the computer to sleep (with it set to show the login screen immediately upon sleep).

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+1 this should have more votes. This really clever and MUCH less of a pain then SSH'ing in from another terminal. Can confirm it works on Yosemite. – Bailey Parker Feb 7 '15 at 16:00

You could do this if you were connecting to a machine remotely with say VNC.

Another way is to use the screencapture command line utility, by connecing to the mac that is showing the login screen via SSH then using the screencapture utiity

EDIT: You could write a shell script or using a cron job on a timer using the screencapture command line.

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Do you have any example of such a timed script? – Abraham Vegh Jul 15 '09 at 13:47

Use the "grab" utility in the Applications / Utility folder.

It is a screen shot tool provided by apple. It has a variety of options for the single mac user.

Or, let someone else do the work.

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Grab won't work on the loginwindow process. – Chealion Jul 15 '09 at 15:10

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