This is rather strange. When I select and drag objects around in perspective mode, tiny white artefacts start to appear on the wireframe of my model rendered in “wireframe” in the front view (almost like static, but only on the model).
What OSX version and Mac hardware do you have? Also, is this with any model or just one in particular? Lastly, is your Wireframe mode set to the defaults via Preferences>Display Modes>click the gear icon?
If you can record a video capture as well or post a screenshot, that would help me to understand what you’re seeing. It’s not something I’ve heard or remember hearing about.