It may not identify them correctly by name, but it should have the right number of devices listed.
From the Contents column on the left, under the Hardware header, select USB the panel to the right will show all the USB devices that the computer recognizes. Open System Profiler from the Utilities folder, which is inside the Applications folder. If it works again, there is an incompatibility with the device and whatever you added. Did you recently add another new device? Install a new program? Try reverting the computer to the way it was before the device stopped working. Is it a new device, or a device that stopped working?Īsk yourself, is this a new device that never worked, or is it a device that you've had for a while that suddenly stopped working? If it used to work, think about what changed just before the device stopped working. If you find this to be the case, contact the manufacturer for assistance.ģ. Sometimes two devices will have a conflict and won't work together. Then start plugging in USB devices one at a time, testing each one to make sure they all work before adding the next. Unplugging other devices that's plugged into the USB portsįor troubleshooting purposes, unplug all USB accessories from the computer. Make sure that the connection is secure.Ģ. Unplug the affected device from the USB port and then plug it back in. Make sure connection to the USB port is secure
