MAC OS x System default path is the Desktop folder, the default format is the PNG picture format, how to customize the settings?
Open Terminal (Terminal) and enter the following command:
Defaults write Com.apple.screencapture location/path/
/path/ is the save path that you want to set, such as storing the file in the picture (Pictures) folder of the user directory, the command is:
Defaults write Com.apple.screencapture location ~/pictures/
Next, for the change to take effect, enter the following command:
Killall Systemuiserver
Of course, if you are accustomed to be saved on the desktop, the/path/ corresponding path is ~/desktop/.
The OS X system default file format is PNG, and the following terminal (Terminal) command can be used to modify the file format to JPG:
Defaults write com.apple.screencapture type jpg
Alternatively, you can modify the JPG in the command to GIF or PDF, and change back to the default PNG format. Also, don't forget to enter the command above that makes the change effective.
Mac Settings Save location