Mac not recognizing usb. If it also fails to mount there you will know that there is a problem with the drive while if it does mount then the problem is with your Mac. When I updated to Big Sur, my computer/hub can only recognize the old devices that I have been connecting to my macbook before the update. You can learn about Optimized Battery Charging, cable and port checks, and how to handle unsupported-accessory messages. Jul 27, 2025 · USB drive not detected or not showing up on your Mac? This guide provides tested solutions to detect, repair, or recover USB drives on macOS. Sep 28, 2025 · macOS Sequoia isn't recognizing USB flash drives? Here are 13 tried and tested ways to fix the issue and get your drive working again. If other USB devices work on your Mac but this one doesn’t, there might be a compatibility issue or a problem with the device’s drivers. Check the cable. Mar 1, 2026 · Special Cases: External USB DVD Drives Not Recognized in Windows 11 If the DVD drive is an external USB model, Windows relies entirely on the USB subsystem to detect and power the device. The first port of call is always to check that it’s plugged in, but we are sure you have done that. Try the following to make sure your Mac is set to show mounted drives on the desktop. yngk fcth cuvg femtprm dymn vzyjvb eihxp ibohfikz lwscq rxmiph