If you have many devices connected to your Mac: Disconnect all USB devices except the device you’re testing, an Apple keyboard and an Apple mouse. You might need to disconnect and reconnect the other device as well if it has stopped responding.
If the device doesn’t have a power cable and is plugged into another USB device that doesn’t have a power cable: Try plugging the device directly into your computer’s USB port or into a USB device that does have a power cable. Connect USB 3.0 SuperSpeed devices to a USB 3.0 SuperSpeed HUB, USB 2.0 Hi-Speed devices to a USB 2.0 Hi-Speed hub, and so on.
Visit the manufacturer’s website for any updates.Ĭheck the USB hub: If the device is connected to a USB hub, make sure the device and the hub are the same speed.
I have to unplug replug usb for hp printer to be recognized by my mac how to#
See Find how to service or repair your Mac.Ĭheck for missing software: Make sure you installed the latest software for your device. If you still can’t use a device with the port, your computer may need to be serviced. Wait about a minute, then plug it back into the power outlet and start up your computer. If you can’t use this device, shut down the computer and unplug it from the power outlet. If you can use the device after switching ports, connect another device to the first port.
If you still can’t use the device, contact the manufacturer for more information. If your computer has more than one USB port, switch the device’s cable to another port. Check the power, port and cable connections: Make sure the USB device is turned on and its cables are properly connected.
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