You can refer to this article to identify the port of your Mac device. Identify the ports on your Mac 

1.Mac with Thunderbolt 2:

 Please use a mini DisplayPort cable to connect between your Mac to VP monitor’s mini DP or DP input.

2.Mac with Thunderbolt 3: 

Please use a Thunderbolt 3 or USB Type-C cable capable of DP ALT mode between your Mac to VP monitor’s USB Type-C input.