

If you still can't access your USB flash drive thereafter, you can go to Disk Utility which is a built-in utility to fix disk problems. Solution 3: Check and repair this USB flash drive with Disk Utility Step 3: Go to Sidebar and check External disks so that they can be located in Finder.\ Step 2: Check External Disks in the General tab so that the USB flash drive can be shown on the desktop. Step 1: Click Finder and choose Preferences in the top menu bar. Check the Finder Preferences and see if it will appear. Sometimes, you just can't find the USB flash drive in Finder and on the desktop, but actually, it is mounted on your Mac and just not showing up. If your USB flash drive is not showing up in the right box, you can try to re-plug it, or change another USB port and cable to connect it. Step 3: Check if your USB flash drive is detected by the system in the right box.

Step 2: Double-click on its icon to open it and choose USB in the left sidebar. Step 1: Go to Utilities and choose System Information. If you plug this USB flash drive into your Mac computer but get no sign that this drive is mounting on Mac, you can check System Information to see if this USB flash drive is showing up. Solution 1: Check the USB flash drive in System Information Here are 4 solutions to this unmounted USB flash drive issue according to different causes, you can check them one by one. No matter what results in unmountable USB flash drive, it's urgent to fix/repair USB flash drive not mounting issue on Mac. How to fix/repair USB flash drive not mounting issue on Mac?
