#Mac not detecting usb drive how to#
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Why USB flash drive is in Disk Utility, but it’s unable to mount and be recognized? Why my files can’t be copied to flash drive? Obviously, you encounter disk format problem. Reconnect the battery and restart your Mac.Press and hold the power button for 5 seconds.Insert your USB drive and check whether flash drive not showing up or recognized on Mac issue fixed or not.At the same time, press the power button. Press and hold Shift, Control, and Option keys on the keyboard.

When resetting SMC, you can fix external devices are not recognized and USB ports are not working issue. The method mainly solve some basic problems, such as wrong time, question mark icon, strange mouse scrolling speed, etc. Many authors are recommending to reset NVRAM or PRAM, but it does little to help. Turn to Devices menu > select External Devices.Ĭonnecting USB drive manually may solve the flash drive not showing up or recognized problem on Mac.Click on Devices tab and choose “Ask me what to do” option.Navigate to Applications > Utilities > Devices.If you haven’t ticked the option, flash drive would not show up on desktop or Finder. Swift to Sidebar tab, making sure External disks option is selected under Devices.

Tick External disks option on the General tab.

Go to Finder menu at the top of the screen, and choose Preferences option from the drop down list.

Next, try to access the flash drive again. If your Mac won’t recognize the USB flash drive, I suggest you to unmount the disk: Click on Unmount button > unplug the flash drive > wait about 10~15 seconds > plug flash drive back in. If your flash drive is detected, but you still have the trouble accessing the content on the drive, you can run First Aid: click on drive > hit First Aid > run the process to repair the error on the drive. You can open Disk Utility app to check if the USB flash drive is showing up.

Reboot your Mac and insert all USB devices, including USB flash drive.

Press the power button 5~6 times to completely release the static electricity of the motherboard.

Unplug all USB devices and shut down your Mac.

Connect the USB device to another Mac computer.

Inspect the device for any physical damage or wear.

As for USB ports, they can become dirty and worn over time.

The damage of USB device would cause flash drive not showing up on Mac, particularly if you’re using a cheap and low-quality product.

#Mac not detecting usb drive upgrade#

Give them a try before you buy a new USB flash drive or upgrade your system. The following methods can solve most USB flash drive not showing up on Mac issues.

#Mac not detecting usb drive how to#

How to Fix USB/Thumb Flash Drive Not Showing up on Mac?Īccording to the reasons, you can find the corresponding solutions.

Old operating system can’t recognize the flash drive (update the system).

USB firmware is corrupted (buy a new one).

USB flash drive is damaged (buy a new one).

Main possibilities why USB flash drive not detected or recognized: Most problems of flash/thumb drive can be solved effortlessly. When you are stuck on the undetected USB flash drive, investigate each of reasons. There are several root causes that would lead to USB flash drive not showing up on Mac.

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