When I connect to the USB ports at the back of the iMac, everything's fine. However, when I connect a hub, some items (like external drives, USB sticks, or even a printer) doesn't seem to want to connect.
The hubs are powered, and one even has some higher voltages connection for charging smart devices.
Is there a reason why my hubs are so inconsistent? How can I fix this?
Thanks!
iMac with Retina 5K display, iOS 8.2, null
Reset the SMC, this may take several attempts. Also, please only use USB hubs that have their own power source. DO NOT connect a bus powered USB hub.
Reset the SMC, this may take several attempts. Also, please only use USB hubs that have their own power source. DO NOT connect a bus powered USB hub.
You may need to zap the PRAM a few times. Link already provided by "rkaufmann87."
**NOTE: Make sure you disconnect all devices (except for the keyboard & mouse) from your computer when troubleshooting.**
USB hub - works only some of the time
