How to take screenshot of the window without drop shadow in OS X

Standard approach:

1. Press cmd + shift + 4

2. Press spacebar to and select the window

3. Your image includes an extra shadow around the window - sometimes it looks awesome but you can turn it off

Run this code in your terminal:

defaults write com.apple.screencapture disable-shadow -bool true

and restart the system service:

killall SystemUIServer