Next, in the menu bar click on the date and time. Then choose "Open Date & Time Preferences..."
In the Date & Time window, if there is a lock in the lower left corner click it and enter in the Administrator username and password. (This will allow you to edit the settings in this window.) Next, near the top of the window uncheck "Set date and time automatically". In the area directly below this, manually adjust the date and time boxes by clicking on the individual numbers for each section and typing in the correct number. Once this step is complete, click the 'Save' button but do not close the Date & Time window as you will need to return to it at a later step.
Have you ever received the following error message when attempting to open Configurator using the cart MacBook?
If you answered "yes," then chances are the MacBook isn't connecting to the CPS network because the date and time are incorrect. To confirm, click on the date and time time listed in the menu bar at the top right of the screen—sometimes just the year is incorrect; other times all the information is incorrect.
To resolve this issue you must first turn off the Wi-Fi on the MacBook.
Written by Gerald Proctor, iOS Device Management Administrator
Go back to the menu bar, click the Wi-Fi icon, and choose "Turn Wi-Fi On." After a few moments the MacBook will automatically join the CPS network. Now that you have a working internet connection, return to the Date & Time Preferences window and check the box next to "Set date and time automatically" to re-enable this feature. Close the Date & Time window.
You should now be able to open Configurator and not receive the "could not refresh the iOS update catalog." error message.