The online search, which was also found in Apple's Chinese support community, including inquiries about Apple's technical support, was not answered, and was later seen in Apple's American support community, as well as a solution.
Workaround:
1. Connect login to No line by the management interface, such as Tp-link's management portal is http://192.168.1.253
2. In which to modify the parameters of the wireless settings, the default setting of the channel "Automatic" to the Channel "N", as to the N take 1~13 which value, specifically to try it yourself. For example, Ben, an American support community, uses an imac connection with a channel set to 8, a channel set to 6 when using the Mac Pro connection, and my Mac Pro is set to 1 o'clock when connected.
It is estimated that the HDMI signal may conflict or interfere with the Wi-Fi signal, and for what reason Apple is required to give an accurate answer.
Possible conflict resolution between the HDMI interface of MAC Pro and Wi-Fi