1.U need to Download it
2.U need to download the ipsw for ur device: http://ipsw.me
3.Open Terminal
4.Type: /users/YOURFILEPATH/script-find_offset.sh
(Example: /users/UnbreakCode/Downloads/script-find_offset.sh
5.Then type: /users/YOURFILEPATH/script-find_offset.sh /users/YOURFILEPATH/iPhone_4.7_10.3.2_15B202_Restore.ipsw
(Example: /users/UnbreakCode/Downloads/script-find_offset.sh /users/UnbreakCode/Downloads/iPhone_4.7_10.3.2_15B202_Restore.ipsw
6.Wait
7.Type: /users/YOURFILEPATH/script-find_offset.sh [Device Number] [iOS Version]
(Example: /users/UnbreakCode/Downloads/script-find_offset.sh iPhone7,2 10.3.2
Thats it!