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Unfortunately, faulty hardware is almost impossible to fix on your own, so you’ll need to take your Mac to a qualified professional, for example by booking an appointment at your local Apple store. If cleaning the port hasn’t solved your problem, then the hardware itself might have failed. If the peripheral device has a port, or you’re using a cable that has a port, then check these additional ports for any signs of dust or debris, and repeat the cleaning steps if required. How To Fix Mac OS Bluetooth Connection Issues Regardless of what’s causing your USB-related woes, by the end of this article you’ll know exactly what you need to, in order to fix it. Once you’ve identified the component that’s causing the problem, I’ll also be sharing suggestions for fixing that particular component. In this article, I’m going to show you how to put each of these components to the test. Is the port to blame, or could the peripheral device be faulty? Maybe the cable’s broken? Or perhaps there’s a bug with macOS? Macs aren’t exactly blessed when it comes to USB ports, so if one of your ports starts acting up, then you’re going to feel the loss! If your Mac is failing to recognise a device that you’ve connected to its USB port, then the first step is figuring out where the fault really lies. Although wireless peripherals are becoming more popular, USB is still one of the most common ways to connect an external device to your Mac. Many people use additional devices with their Macs, such as external displays, keyboards and mice.