Fix Usb Flash Drive Mac

  • I decided to take my work flash drive home to work on a file. At home I saw that some weird files were on the flash drive and wouldn't delete, so I decided to save my files on my Mac and erase the USB flash drive. I selected the flash drive (by the way it's a 2 GB flashdrive) and I used the SECURITY OPTION 35 PASS ERRASE. Format: MS-DOS (FAT).
  • Jul 27, 2019 Once the USB Flash Drive appears on Mac. Run First Aid on External Drive to Repair Flash Drive. Steps to Fix USB Flash Drive Errors with Terminal: Before you begin the procedure, make sure the flash drive is plugged into your Mac.
  • Create bootable USB drive with Mac Disk Utility. Now that you have the installation files ready on your Mac, you can move them to your USB drive for future use. To install macOS on an external hard drive: 1. Connect the USB to your MacBook. Open Disk Utility by following Applications → Utilities → Disk Utility.
  1. Fix Usb Flash Drive Mac Os
  2. Fix Usb Flash Drive Mac Free
  3. Mac Usb Flash Drive
  4. Fix Usb Flash Drive Cmd

Summary :

Expecting to see the USB drive on desktop after connecting it to Mac? Mac may disappoint you sometimes: your flash drive may be not detected. Why is this happening? How to fix when USB not showing up on Mac? Find your answers in the following content provided by MiniTool Solution. Besides, it shows you how to troubleshoot when internal hard drive not showing up.

USB Not Showing Up on Mac

Step 1: Get your disk/usb flash connected to MAC Step 2: Start terminal in mac Step 3: Start disk utility Step 4: Type ' diskutil list ' Step 5: Type ' diskutil repairDisk /dev/disk2 ' when disk2 is the one that you need to repair Step 6: Type 'Y' to confirm the repairing disk on mac with terminal. Oct 20, 2021 Is there any mac terminal to fix damaged usb flash drive? You may use command line in mac terminal to fix damaged disk or flash drive by the following methods. Start mac terminal. Step 1: Get your disk/usb flash connected to MAC; Step 2: Start terminal in mac; Step 3: Start disk utility; Step 4: Type 'diskutil list'.

Many people are complaining about the same problem on the internet: USB not showing up on Mac (flash drive not showing up Mac, SD card not showing up Mac, or thumb drive not showing up Mac). Most of the time, the flash drives are connected to Mac through USB, but you may be disappointed to find out that Mac won't recognize USB sometimes.

Various solutions are provided for you to fix USB flash drive not recognized error and recover data from the inaccessible flash drive.

Can you fix USB not showing up on Mac? How to find SD card on Mac? Actually, the methods and solutions are similar to hard drive not showing up on Mac.

Tip: Please take actions immediately to recover data from your USB drive when it becomes abnormal. You can find data recovery tool designed for Mac and Windows platforms easily on the internet.

Data recovery tool for Mac:

Data recovery tool for Windows:

Reason 1: Connection Problem

Connection issue is one of the most important reasons why your USB drive not showing up Mac. The broken cable/port, or insufficient/unstable power supply could make your Mac not recognizing USB. When find your flash drive doesn't appear on Mac after connection, you should first do the following things:

  • Check the connections and USB cable.
  • Change or reset the USB ports.
  • Make sure the power supply is enough.

Reason 2: Improper Finder Preferences Settings

You should go to change the Finder Preferences:

  1. Open Finder.
  2. Click Finder and select Preferences.
  3. Check External disks under both General tab and Sidebar tab.

Reason 3: Errors Detected on USB

Please run First Aid to repair your USB flash drive:

  1. Open Finder.
  2. Select Applications.
  3. Choose Utilities.
  4. Click Disk Utility.
  5. Select your USB drive from the left pane.
  6. Click First Aid at the top of the right pane.
  7. Choose Run in the confirmation window.

In addition, you can check the USB drive and fix it in Terminal.

Reason 4: Not Supported File System

How to reformat the USB drive to a File System that can be supported:

  1. Navigate to Disk Utility.
  2. Select the USB drive.
  3. Select Erase at the top.
  4. Choose a proper file system.
  5. Give it a new name or specify a proper file system (optional).
  6. Click on the Erase button and wait.

Other possible ways to fix USB not showing up on Mac:

  • Check the USB flash drive in System Information.
  • Reset SMC (how to the SMC of your Mac?)
  • Update macOS and firmware.
  • Reinstall or update the USB driver.
  • Get professionals to help you.

That’s all about how do I get my Mac to recognize my USB.

Internal Hard Drive Not Showing Up Mac

What about hard drive not showing up? Please read this page when external hard drive not showing up on Mac. As for the internal hard not showing up problem, I’ll discuss it in 2 situations: Mac can start up and Mac can’t start up.

Mac Can Start up

If your Mac can still boot up when the internal hard drive is not showing up, please try the following fixes.

Fix 1: modify Mac settings.

  • Go to Finder -> Preferences -> General, and make sure the Hard disks option is checked.
  • Go to Finder -> Preferences -> Sidebar, and make sure the Hard disks option is checked.
  • Go to Finder -> move your cursor to the Locations section in the left panel. When you see the word 'Show' or 'Hide', please click to change it and then check whether the internal disk appears.

Fix 2: check in Disk Utility.

  • Try to mount the internal hard drive manually.
  • Run First Aid to repair the internal disk.

Mac Can’t Start up

If your Mac doesn’t boot up as usual, you won’t be able to access the internal disk. In this case, you should follow these fixes to repair.

Fix 1: repair in macOS recovery mode.

You should boot into the macOS Recovery mode and run First Aid:

  1. Press and hold Command+Option+R Release these keys when an Apple logo or spinning globe appears.
  2. Choose Disk Utility from the menu.
  3. Select the internal hard drive from the left panel.
  4. Click First Aid and wait for the repair process to end.

Fix 2: check in Terminal.

You can use terminal to check the internal hard drive, especially the internal Fusion drive since it is split into an extra SSD and a hard drive. This kind of drive is invisible to users unless you check it in Terminal.

Please note:

Stellar Data Recovery for Mac is also useful if you want to recover data from an unbootable Mac. Here’s how to recover data from the corrupted internal hard disk on Windows.

How do I get my Mac to recognize my USB? I insert a SanDisk Cruzer Glide USB Flash drive into my Mac, and wait for about 3 minutes, and it does not show up. Till now, my Mac is still failing to read it.

Similar to a hard disc, USB flash drive can also be used to store and transfer photos, movies, music, documents, and more. More pleasantly, it is easier because it is portable to help to carry files among computer, camera, and mobile phone.

However, the experience where you are trying to insert a USB flash drive into Mac, and find it does not show up, bothers many of you.

Why is USB flash drive not showing up on Mac?

How to read/recognize/access your USB flash drive on Mac?

That's what we shall uncover.

Flash Drive Usb Not Showing up Mac


Part 1. Why is USB flash drive not showing up on Mac?

The reason why USB flash drive is not recognized by Mac is various.

Here we summarize most of them:

  • • USB flash drive device is physically damaged.
  • • Mac USB port is not working.
  • • Wrongly format or eject USB flash drive before.
  • • USB driver is unavailable or outdated.
  • • USB firmware is virus attacked or corrupted.
  • • Old macOS can't recognize the flash drive.
  • • …

There may be other unknown reasons for USB flash drive not accessible on Mac.

Though the reasons are various, you could still follow the universal solutions below to fix this problem. No cost and you can do it by yourself.

Part 2. How to recognize not showing up USB flash drive on Mac?

Fix 1. Check USB flash drive and USB port

Of nothing comes nothing.

If your USB flash drive is damaged, then it is not possible to show up on Mac.

Similarly, the problematic USB port on Mac also fails to recognize your USB flash drive.

Check them firstly.

> Disconnect your USB flash drive and reconnect it.

> Insert your USB flash drive into another USB port on this Mac.

> Change another one computer to insert USB flash drive.

> Update the USB driver.

Fix 2. Check Mac power

Your USB flash drive device may be not accessible to Mac due to the insufficient power.

If you use a bus-powered USB hub and get multiple devices connected at the same time, then your Mac may not supply the enough power.

For fixing it, just connect your USB flash drive to USB post on Mac directly.

Fix 3. Restart Mac

Like fixing any iPhone issues, restarting the device may also work sometimes.

Here, you could try to disconnect your USB flash drive and restart your Mac, and then reconnect it to see if it shows up successfully.

Still not work? Move on the next fix.

Fix 4. Reset SMC (System Management Controller)

Step 1 Shut down your Mac, and unplug your power adapter.

Step 2 Press Shift + Control + Option and Power button at the same time for 10 seconds.

Note: For MacBook Pro with Touch ID, the Power button is the Touch ID button.

Step 3 After 10 seconds, release all of them, and reconnect your Mac to the power adapter.

Step 4 Press the Power button again to restart your Mac.

Fix 5. Check Finder Preferences


If you disable 'External disks' on Mac, then no USB flash drive or other external drive can be detected by Mac.

Have you disabled the settings? Check it.

Step 1 Go to 'Finder' at the top of the screen of your Mac, and choose 'Preferences' option from the drop down list.

Step 2 Navigate the 'General' tab to make sure 'External disks' option is enabled. If not, just tick it.

Step 3 Switch to 'Sidebar' tab, making sure 'External disks' option is ticked under 'Devices'.

Now, reconnect your USB flash drive to Mac to see if you can use it normally.

If you find Finder responds slowly or keeps crashing, you can check the post to trobleshoot Finder not responding.

Fix 6. Check Disk Utility

If Mac can detect your USB flash drive, but get some difficulties in accessing data within it, you can turn to Disk Utility for help.

Step 1 Locate 'Applications' > 'Utilities' > 'Disk Utility'.

Step 2 Select your USB external flash drive from the left sidebar > Choose 'First Aid' and then it takes minutes to repair the error.

If you find your USB flash drive not detected in Disk Utility, just select the mount option which should mount that disk.

Then you can see if your USB flash drive appears on Mac.

Fix 7. Discharge Static Electricity

Static electricity on Mac may disrupt the appearance of USB flash drive.

So just discharge it.

Step 1 Unplug all the USB flash drive devices and turn off your Mac.

Step 2 Remove the battery, and press the Power button for 5-6 times to release the static electricity of the motherboard completely.

Step 3 Restart your Mac and plug your USB flash drive again to see if the problem has been fixed.

Fix 8. Manage the Manual Connections

Generally speaking, while you connect your USB flash drive to Mac, it will connect it automatically. However, when your USB flash drive device does not show up on Mac, you can consider manually connecting.

Step 1 Go to 'Application' > 'Utility' > 'Device' and click it to tick 'Ask me what to do'.

Step 2 Switch to 'Device' menu and select 'External Devices'.

Then just plug your USB flash drive into Mac to see if it can show up on Mac.

Fix 9. Update Mac

An old macOS may be the reason why USB flash drive is not appearing on Mac.

The solution is very easy, and you just need to update your Mac firmware.

By the way, it is also a good habit to update your Mac.

Just careful to update Mac, because failure update may lead data loss on Mac. So just develop another good habit to backup Mac.

Fix 10. Format USB Flash Drive

Whether your USB flash drive cannot be mounted or recognized in Disk Utility, or it can be read, but cannot write data, you should know that your USB flash drive gets disk format problem.

For fixing it, you just need to format your USB flash drive.

Before you format your USB flash drive, you should know that not all USB flash formats are accepted by Mac.

Check the following table to see what different USB flash drive format work differently on Windows and Mac.

Mac (10.6.4 or earlier)Read only
Mac (10.6.4 or later)Read only
Windows XP×
Windows 7/8/10Read-only with Boot Camp

What's more, FAT 32 gets 4GB limit for max file size and 8 GB max partition size, and others get no limits. So ExFAT is undoubtedly the ideal option.

Now, let's see how to format the USN flash drive not showing up on Mac.

Step 1 Plug your USB flash drive to Mac, and launch Disk Utility meanwhile.

Step 2 Click the USB flash drive in the left sidebar, and choose 'Erase' on the right panel.

Step 3 Select 'ExFAT' in the 'Format' dropdown menu and type the name of your USB flash drive.

Step 4 Click 'Erase' button to start to format it.

After the process is done, you will find this problem has been solved.

Part 3. Tips of unreadable USB flash drive on Mac

Precautions on USB flash drive can efficiently stop the not showing up problem.

Here, we gather the tips to help you avoid the problem next time.

1. Eject USB flash drive safely

> Every time you want to exit your USB flash drive, do remember to eject it safely.

> Right-click your external drive on Mac, and choose 'Eject'.

> Alternatively, you could find the Eject icon below 'Device' section of Finder's sidebar.

2. Gently unplug your USB flash drive

> Frequent use of the USB flash drive may damage this external drive and make it loose. You should gently disconnect it from your computer when you want to exit it. Do not brutally.

3. Make USB flash drive clean

Another reason for your Mac not recognizing external drives is a dirty. So you had better put the USB flash drive into a box to protect it from dirt.

4. Recover data from formatted USB flash drive

The last solution in part 2 will format your USB flash drive, and it will also wipe all data within it. Though you have successfully fixed an unreadable flash drive on a Mac, you also lost your data.

Fix Usb Flash Drive Mac Os



Not complicated guide, but only Aiseesoft Data Recovery is enough with simple 3 steps.

Aiseesoft Data Recovery is the professional USB flash drive data retrieval software for Windows and Mac. Even if your USB drive is formatted, it can quickly and safely scan and recover all data.

  • Recover data USB flash drive formatted, crashed, damaged, etc.
  • Recover photos, videos, audio, documents, and more from USB drive.
  • Support USB drive from SanDisk, Toshiba, Samsung, SSK, Kingston, etc.
  • Work on Windows 10/8/7 and Mac.

Step 1 Free download this data recovery software on your computer. It highly supports Windows and Mac. Install and run it immediately. Here we take Mac as the example. Meanwhile, insert the formatted USB flash drive to your Mac.

In the main interface, select and click 'Mac Data Recovery'.

Note: For Mac running Mac OS X El Capitan or later, you need to disable System Integrity Protection firstly for using Data Recovery on your Mac.

Step 2 In the main interface, you need to select the data types and disk drive for scanning.

For data types, you are capable of selecting images, audio, video, email, documents and other data.

As for the drive, you just need to tick your USB flash drive.

Click 'Scan' to start a quick scan on your Mac.

Step 3 After the scan is complete, you will find the scan result sorted by Type List or Path List.

View the details in the right panel by clicking the data type or path list from the left sidebar.

After confirming the data you want to recover, click 'Recover' button to restore the lost data from formatted USB drive to your Mac.


In this page, we focus on the problem that USB flash drive is not showing up on Mac. We explain the reasons and gather the full 10 solutions to help solve it. Last but not least, we also recommend some tips, so that you will not suffer from such issue.

Has your problem solved with the solutions above?

Fix Usb Flash Drive Mac Free

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Fix Usb Flash Drive Cmd

May 22, 2019 20:30 / Updated by Nicole Jones to File Recovery

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