* Make sure your hardware is ver 4.0 or higher. (The version number is printed on the back of your device).
* Follow below link download MAC's utility from Apple Store. 
https://apps.apple.com/us/app/cell2jack-utility/id1503448091?ls=1

If you have Windows 10 PC, please click here for instruction

Note 1:
Use the short USB cable we provided connects Cell2Jack's "5V in" port to your MAC's USB port.
If your MAC does not have standard USB port, you need to use an USB Hub to connect.

​Note 2:
If you MAC have not installed USB driver yet, please download from below link
https://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver/raw/master/CH34x_Install_V1.5.pkg