my zmuipng hub is not working any more in my usb

Ok, I found the workaround for this hub. It was listed on the Amazon page and this worked for me right away. Plug in the mac power cable into the USB Hub then magically the other ports started to work. You have to keep the power cable plugged in while you use it though. Because of apple's update, the company is no longer recommending people buy the unit but at least the temporary fix seems to work for those that already have it.

I have the same issue!