All macOS and iOS devices are hard-coded to automatically join a network during the setup assistant. This option can used to provide a quick and simple way to speed up over-the-air device deployments.
Please Note: macOS and iOS devices will only auto-connect to this network when at the setup assistant.
WiFi Network Details
In order to take advantage of this, setup a new wireless SSID with the following details:
SSID: Apple Store