If you have a newer mac, you should be able to do the following
1. Plug in the Zebra printer to your mac via the USB cable
2. Go to System Preferences > Printers and Scanners
3. Press the + add button
4. Select the following. Click on Zebra Technologies...> ZebraZPL Label Printer > Click OK > Click Add. You can then go into ShipLeap, select the new printer, and you should be all set.