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Fix Mac Not Recognizing USB With Technical Steps

Mac Not Recognizing USB is an annoying issue. When you try to connect the USB drive to the device, you get this error message. Mac device not recognizing the external drives is one of the critical issues for Apple users. Therefore, you won’t be able to connect the external drive without fixing it. However, we are going to discuss some of the effective steps to handle this issue without any technical hassle.

Significant Reasons for “Mac Doesn’t Recognize USB” Error

Lots of common but critical issues you must know which are responsible for creating “USB drive not recognized Mac”. So, go through the following reasons and identify the exact problem at the very initial stage of the error.

  1. Loose USB connection or presence of dirt sometimes create the connection issue between the external drive and the Mac device.
  2. If you remove the drive by pulling actions without clicking on the “Eject”, then it creates the Mac Not Recognizing USB issue very often.
  3. If there is any hardware issue/ internal device problem, then these trigger the problem at times.
  4. Obsolete iOS device many times prevents the connection between the MacBook and the USB external drive.

Resolve “Mac Not Recognizing USB” with a Few Simple Steps

Some of the effective methods are there to fix Mac Not Recognizing USB issue technically. Moreover, it is very important for Mac device to connect other peripherals and external devices for transferring the data. So, try out the steps below and fix the problems as soon as possible.

Check Cable Connections

First, check whether the USB cable is connected o the USB ort tightly or not. Moreover, If the cable is found as defective, then replace it with the new one. Similarly, verify the USB ports. If the port is damaged, then try to repair it as soon as possible.

In the case of the hub connections, you might use the direct link for connecting the USB drive to the Mac port.

Reset SMC

  1. Turn off the Mac and disconnect all the peripherals attached with it.
  2. Now, connect the power adapter to that device and hold the Shift button while pressing the Ctrl, Option and the power button together.
  3. Then, release the keys at the same time when the MacBook starts to boot up. It will start to perform the SMC reset process.
  4. It will take a couple of minutes to run the System Management Controller. And when done, you can see the successful message regarding the SMC check.

Run Disk Utility Program

  1. Open the Mac device and click on the Applications tab from the menu appeared on the screen.
  2. Now, choose the Utilities from the Application window appeared on the screen.
  3. After that, tap the Disk Utility from the resultant window and check whether you can see the drive or not. If it appears in the list but not mounted, then enable the Mount that disk option.
  4. Next step is the Mac device verification process. So, start to verify the device visibility, click on the Apple logo from the left corner of the screen.
  5. Now, select the About this Mac from the restaurant window and choose the Storage tab from the next window.
  6. Check whether the device name is enlisted on in the drive list or not. If not, go back to the Disk Utility window.
  7. Choose the external drive from the left sidebar of the active window. Select the First Aid or Verify (repair) disk option from the screen.
  8. This program will run to locate the corrupted driver files and repair them accordingly. Finally, check whether the “Mac doesn’t recognize USB” issue is resolved or not.


  1. Shut down the Mac device and wait for a few seconds.
  2. Now, hold down the Command button and press the Alt + P + R from the touchpad.
  3. You can hear a sound and hod the button together until the screen flashes. It indicates that the RAM is flash out and all of the data are removed from your Random Access Memory unit.
  4. Next, wait until the beep sound comes and the MacBook boots up as usual in normal mode.

Inspect the Console

  1. Choose the Application tab from the menu items appeared on the Mac display.
  2. Now, choose the Utilities from the drop-down menu and launch the Utility window.
  3. Click on the Console and open the Console app. It will say whether the external drive is detected by the Mac device or not. If it is not recognized, then the USB icon will not be present on that list.
  4. However, open the Console and choose the Error from the list before attaching the USB driver to detect the problem quickly.
  5. After locating the problems, click on the Faulty tab and repair the technical errors effectively.

Update iOS App

  1. Open the App Store by tapping on that specific icon appeared on the iOS devices display.
  2. Now, choose the System Updates from this app and tap the Update tab from the resultant window.
  3. You get a list of available Updated versions and select the correct one which is compatible with your Mac device.
  4. So, hit the Update button and start to install the apps one after another with the latest version. It will take several minutes to complete the entire installation process and when done, try to connect the USB to the Mac. Now, check whether USB drive not recognized Mac gets fixed or not.

Fix the USB Drive Error with Terminal

  1. Select the Utility option from the Application menu tab and launch the Disk Utility window. Now, open the Terminal window by tapping the Terminal option from the sub-menu appeared after selecting the Disk Utility.
  2. Now, type “diskutil list” in the search box and press the return key. It will find out the disk number of that USB flash drive.
  3. Again, type “diskutil info disk2” and hit the Return to replace the disk Number with 2 of the USB flash drive.
  4. Next, type “diskutil eject disk 2 and press the Return to eject the device.
  5. Then, again type “disk util list” and search whether the USB driver name appears on the Terminal list or not. If it is not seen in that list, then close the Terminal window.
  6. Launch the Console window to inspect the USB Driver errors.
  7. Finally, click on the Error and Faults to verify whether the error persists or not. Then, connect the USB drive to the Mac device and check whether the message, “Mac not recognizing USB” appears on the screen or not.

Wrapping Up

In the above article, we have analyzed the significant issues for the “Mac not recognizing USB” that helps you to identify the core factors responsible for this problem easily. Moreover, we have given some of the effective solutions to fix this annoying issue technically. So, we hope this content will help you a lot to avoid this effortlessly.