Unplug the USB hub from the Mac and reconnect it again, and make sure that all cables and both ends of the USB hub are firmly connected If possible, connect the Hub to another Mac of the same model and check the usage. Please keep the Internet connection connected when troubleshooting) (Note: Before restarting the PC, please make sure to add bookmarks to the opened web pages and save all open documents, spreadsheets or other unsaved work. Wait 10 seconds, then press the power button to turn on your Mac. Wait 30-60 seconds, and then reconnect the power cord.

Shut down your Mac, then unplug the power cord. When your MAC system does not recognize the USB hub, first try the following operations to make the computer recognize the hub. (Note: During troubleshooting, please keep the Internet connection connected.) The following troubleshooting steps may wake up the hub to make it work. So what should we do if the MAC OS system cannot recognize the USB hub? For this phenomenon, many users don’t know how to solve this problem. You buy a hub to expand the USB port of your computer, but one problem you may encounter after having a hub is that the MAC OS system cannot recognize the USB hub or the USB hub is not detected at all. The USB 3.0 port is the most common port in today's computers, but as the number of external devices on the computer increases, all motherboard manufacturers will provide an integrated USB 3.0 driver-a USB hub.

Mac usb hub