How to fix/repair USB flash drive not mounting issue on Mac? Disk Utility failure, log file corruption, OS malfunction on this Mac.File system errors, volume header corruptions, etc.

Faulty connections like broken cable and wobbly USB port.

The possible reasons for this issue include: This is because that this external drive is connected to the Mac computer through USB cable, USB port and many other components. What makes the hard drive not working problems like USB flash drive unmounted on Mac can be various. Why the USB flash drive is not mounting on Mac? How to recover lost data from unmounted/unrecognizable USB flash drives? But don't worry, this page talks about the reasons for this issue, and how to fix 'USB flash drive not mounting on Mac' without data loss even if the external hard drive is not showing up on Mac. However, if the USB flash drive is not mounted on Mac, you will lose access to the USB flash drive as well as to the data stored on it. It is user-friendly that Mac will automatically mount the inserted USB flash drives. How can I fix/repair the USB flash drive not mounting issue on Mac? But the USB flash drive was grayed out in Disk Utility and I could not mount it. So, I went to Disk Utility, it was there. Boot the device that you want from the USB stick.When I plugged in my USB flash drive on macOS High Sierra, I can't see it in Finder or on the Desktop.

Run diskutil eject /dev/diskN and remove your flash media when the command completes.

Start the 'Disk Utility.app' and unmount (don't eject) the drive. Note: If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use. Use the same command but replace bs=1m with bs=1M.

Note: If you see the error dd: Invalid number '1m', you are using GNU dd. Note: Using /dev/rdisk instead of /dev/disk may be faster. Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located for example.Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command - in the previous example, N would be 2).Run diskutil list again and determine the device node assigned to your flash media (e.g.Run diskutil list to get the current list of devices.

dmg ending on the output file automatically. Hdiutil convert -format UDRW -o /path/to/target.img /path/to/source.iso Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight).Tip: Drag and Drop a file from Finder to Terminal to 'paste' the full path without typing and risking typos. img file that you will be required to create from the. This quick step by step will show you how to make a bootable USB stick from a downloaded ISO image file using an Apple Mac OS X.

Os x flash drive