Here’s how to change the default format for your Mac screenshots:

  1. Hit Command+Space to open Spotlight.
  2. Type “terminal” and select Terminal.
  3. Ignoring the quotation marks, type “defaults write com.apple.screencapture type " followed by the desired file format. Your options are JPG, TIFF, GIF, PDF and PNG. Make sure to enter a space between ’location’ and the format.
  4. Click Enter. Now, your screenshots will appear in this format. If they do not, restart your mac and they will.

macOS Guide

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