Hide Content in Mac Preview Screenshots

I was looking for a quick way to blur out sensitive information in a screenshot using Preview on a Mac. While I didn’t find an actual blur tool, something can can accomplish the same thing is simply drawing a box around the area you want to hide and pressing delete – see screenshot below where my Access Key ID is whited out:

Screen Shot 2017-08-08 at 7.36.11 AM

This seems to only work in image files, not pdfs.

Source:

https://forums.macrumors.com/threads/is-there-a-way-to-blur-text-in-preview.1744916/

https://apple.stackexchange.com/questions/72971/tool-to-quickly-hide-blur-redact-text-in-screenshot

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