May 18, 201016 yr When you use the Apple Mac OS X Grab Utility to capture screen shots, the default format is .tiff which is not always accepted everywhere. A lot of questions get brought up, "How can I get Grab to default to JPEG instead of TIFF?" Answer: Open Terminal and copy and paste the following defaults write com.apple.screencapture type jpeg This does require you rebooting/restarting your Mac for the defaults to become active.
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