Do some basic checks. If your Toshiba external hard drive doesn't show up when connected to a. You can now start backing up your data using the external drive. Once you have backed up all your data, you can try a few fixes to your 'unmountable' hard drive problems. 4 Fixes to a MacBook Pro That Can't Mount Its Startup Disk. In most cases, mounting is an automatic process that happens as soon as the hard drive is connected to a Mac.
- External Drive Not Showing Up Macbook Pro
- Macbook Pro Won T Power Up
- Macbook Pro External Hd
- Macbook Pro Not Turning On
Your Mac not recognizing an external hard drive can be cause for panic. But try to remain calm — it's unlikely that anything has happened to your files. All of your data will still be on the hard drive, it just that, for whatever reason, you can't access it.
Just so that you worry not about losing data, get Disk Drill. Available via Setapp, the app is the best tool that will rescue your files.
Download Disk Drill FreeFortunately, there are ways and means of getting the hard drive back up and running. Let's get into some of them right now.
Why a flash drive is not showing up on Mac?
If you've plugged in a flash drive or USB drive and it's not showing up on your Mac at all, it could be down to a faulty cable or USB port.
Before you try any system troubleshooting tips, start with the basics.
- Check that the drive is probably plugged in.
- Check the USB connector — does it look damaged or misshapen in any way?
- Check the cable — is it frayed or are there any wires exposed?
- If the external hard drive is plugged into a wall outlet, try a different outlet.
- Try a different USB cable — even cables with no visible defects can fail.
- Try connecting the hard drive to a different USB port — it could be a hardware issue.
- Try the drive in another Mac — if it works there, the problem is with the USB ports on your Mac.
- Test the hard drive on a PC — it could be formatted for PCs and not readable on Macs.
- Reboot your Mac — a simple on and off is sometimes all it takes.
- Reboot USB drives by shutting down your system and restarting it, holding Command+Option+P+R as you do. When you hear a sound and see the screen flash, release the keys and let your Mac boot up as usual.
If you've carried out visually inspections, tested your hard drive with different cables and power outlets, and tried different systems with no luck, it's time to put your Mac to work.
External Drive Not Showing Up Macbook Pro
1. Change the Finder settings
One of the most common reasons for Mac not recognizing external hard drives is due to the system not being set up to display hard drives on the desktop. There's a simple fix for this:
- Open a Finder window.
- Go to Preferences > General.
- Check that the External disks option is enabled.
If your Mac is not recognizing a USB or external hard drive after this, you'll have to try mounting it manually.
2. Mount an external hard drive on Mac
Photo optimizer software. If Mac isn't automatically recognizing your external hard drive, it's time to force it to. Connect your hard drive and follow these instructions:
- Go to System Preferences > Disk Utility.
- Check that the external disk is listed in the left sidebar.
- Highlight your hard drive and select Mount. It should now appear under devices in the Finder.
If the hard drive still isn't playing ball, the next step is First Aid.
3. Run First Aid on an external hard drive
Mac's built-in First Aid tool is designed to verify and repair a range of issues related to corrupted files and apps, startup issues, and, crucially, external hard drive problems.
If your issue has to do with wanting to know how to open a flash drive on Mac that's displaying but not allowing you access to files, First Aid might be able to help.
- Go to System Preferences > Disk Utility.
- Highlight your external hard drive and click on First Aid.
- Select Run to start running diagnostics and prompt Mac to automatically fix any issues.
If First Aid is successful in repairing any faults, your hard drive should be available to mount. If not, you'll need to try the next option.
4. Delete potentially conflicting apps
How recent is the problem? If a flash drive not showing up on Mac was completely fine a few days earlier there could be an app causing conflict. If you've downloaded any new apps recently, uninstall them one at a time, connecting your hard drive after each uninstallation to see if the issue is resolved.
You can delete apps using the Launchpad or by dragging them to the Trash, but neither method is recommended in this situation. You see, while an app might appear to be deleted, associated files will be left on your system — files that could be preventing access to your external hard drive.
Instead, let CleanMyMac X take care of it. CleanMyMac X has an Uninstaller tool that can define your installed applications and associated files and remove every trace of an unwanted app.
And it couldn't be easier to use.
- Download CleanMyMac X (for free).
- Launch the app and select Uninstaller.
- Click on View All Applications and select a recently installed app.
- Click Uninstall.
If you've worked through all recently installed apps and are still no further forward, your hard drive may have crashed or, worse, be completely broken. In this case, you'll need a heavy duty tool like Disk Drill to rescue files.
5. Repair disk permissions
Disk permissions keeps your files secure. Every file and folder has an associated set of permissions. Unfortunately, these can get messed up without you realising it, which can cause serious problems. You can fix these two ways. Either manually, as we mention in this article, or using CleanMyMac X, which is far easier.
All you need to do is:
- Click on Maintenance from the left sidebar menu.
- Check the box next to Repair Disk Permissions.
- Click Run.
The program will scan and fix any it finds that are broken or faulty. Your Mac should be running as good as new.
To prevent an external hard drive not showing up on Mac turning into an all-out disaster, always backup files on your system hard drive and in the cloud. Anytime you use an external drive, unmount the disk properly and store it safely. And finally, use CleanMyMac to uninstall apps and run regular Maintenance on your system to prevent applications conflicting with hard drive performance.
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External hard drives are not only important for their data storing capability but also for their portability function. Whenever you connect your external hard drive or USB to your Mac computer it shows up not only on the desktop but also in the Finder menu on the left-hand side under Locations or Devices.
If you have found that the external hard drive is not showing up on Mac then, the problem could be due to various reasons like the external hard drive or USB corruption, faulty USB connector, hidden drive, physical damage to the drive, improper formatting, etc.
Regardless of the reasons for the issue of external hard drive not showing up on Mac, by following the proven methods given below you can fix it with ease.
How to Fix External hard drive not showing up on Mac?
Here is a complete guide on what to do if Mac does not recognize the external hard drive. And also find out how to safely recover data from external hard drive not showing up on Mac using the Remo Recover tool.
Fix issue related to External hard drive and USB cable connectivity
Method 1: Connect the External Hard drive Properly
The first and foremost thing to do after your external hard drive doesn't show up on Mac is to check if the external hard disk is properly connected to the Mac or not. Once, it is confirmed that the external hard drive is properly connected to your Mac, then your Mac will easily recognize the external hard drive and the data present on it or else move on to the next method.
Method 2: Fix issues with the USB cable
Plug-in the unrecognized external hard drive to a different USB port of your Mac system to check for any hardware issues. It might look like child's play but inserting an external hard disk to other USB port can help you understand whether the issue is pertaining to the hard drive failure or USB cable.
If there is an issue with the USB cable or HDMI cable connecting your external hard drive to Mac then, it is obvious that external hard drive won't show up. If your MacBook such as MacBook Pro or MacBook Air is having USB-C or Thunderbolt 3 ports then, you need to make use of USB-C to USB adapter to connect the external hard drive to your Mac.
Fixing the damaged USB cable becomes a priority to connect your external hard disk to the Mac system. You can easily figure out the issue by making use of a different USB cable to connect your external hard drive with a Mac computer.
In case, if you still find out that the external hard drive is not showing up on Mac despite using different USB cables then, it can be resolved by changing the preference settings on Mac.
But before you move on to the next method, try to restart your Mac computer once.
Fix logical problems related to Mac not recognizing external hard disk
Method 3: Reset Mac computer
Resetting a Mac computer can reboot a few system settings to its default and ensure any issue with respect to it is resolved. To Restart your Mac computer,
Go to the Apple menu and click Restart. (or) Press and hold the power key until a dialog box displays and hit the Restart or press R key.
Method 4: Change Show Preference Settings to Make external hard drive visible on Finder
Macbook Pro Won T Power Up
One of the reasons for Mac not recognizing your external hard drive is due to Show Preference settings. If you have not allowed your Mac to find the external hard disk in the preference setting then, your Mac computer won't show up external hard disk on the desktop. To allow your Mac to show up an external hard drive, follow the below steps to edit preference setting;
- Open a Finder window.
- Go to Preference and select General.
- Under 'Show these items on the desktop', check the External disks option.
If this setting is already setup or your external hard drive is still not showing up on the Mac desktop after the above changes then, here is what it is recommended for you.
In most of cases, the above-mentioned tips will help you resolve the issue of external hard drive not showing on Mac desktop or Finder menu. Despite performing the above steps if the external hard drive does not show up on Mac then, continue reading the further section.
Method 5: Use different Mac Computer
If you still find your Mac not recognizing hard drive then, try connecting the external hard disk to a different Mac system, sometimes there might be a problem with your Mac computer itself.
Run First Aid Utility to repair unrecognized or corrupt external hard drive
Method 6: Repair external hard drive not showing on Mac using Disk Utility
(It is recommended to perform this method to run first aid utility to fix external hard disk only after performing the above methods.)
Make use of the Disk utility function to check if your external hard drive is showing up or not and fix some common USB or external hard drive errors on Mac.
- Navigate to Go > Utilities > Applications > Disk Utility
- If your external hard drive appears in the Disk Utility, right-click on the drive and select Mount. This will make your external hard drive option available on the desktop and in the Finder menu. Thus, you can access all your files present on the external hard drive.
(Note: If the Mac has already mounted your external hard drive (volume) then, the option Unmount will be displayed.) - If the drive is not accessible then, the Mount option will be greyed-out.
(Note: To repair your inaccessible or not showing external hard drive Run First Aid.) - Now, choose the First Aid option and click Run.
- After running the First Aid, if the Disk Utility detects any issues or errors on the external hard drive then, click Repair Disk.
With the help of the above method, you can easily repair the minor external hard drive errors to mount it on the Mac computer to access data from it. In case, if the first aid utility fails to repair the external hard drive or SSD, this indicates the following reasons;
- Your external drive is severely corrupt or broken
If First Aid Disk Utility fails to repair the drive, it could be due to the RAW or broken drive. The file system registry that holds the information of the data present on the drive gets broken or damaged then, Mac would not recognize the external hard drive connected to it. - The external hard drive file system is not compatible with Mac
External hard drive or USB is formatted using a file system that your Mac cannot read. For example, if an external hard drive is formatted using the NTFS file system then, no Mac computer can read or write the external hard drive. In the same way, if the external hard drive or USB is formatted with the HFS+ file system then, no Windows operating system can support it.
ExFAT and FAT32 are the two most common file systems that can be easily supported by both Windows and Mac operating systems.
The only method available to fix this issue of external hard drive not showing up on Mac is to format the crashed external drive on Mac using exFAT, FAT32, HFS+, or APFS, etc.
Note: It is recommended to copy all your external hard drive data by connecting it to you a Windows computer if it is visible on it. In case, if the external hard drive is neither showing up on Widows computer due to severe malfunction. Then, the below method can help it.
Recover Data from external hard drive not showing up on Mac without formatting the drive
Utilize Remo Recover Mac, a specialized data recovery tool designed to recover data from an external hard drive that is corrupt, unreadable, or inaccessible on Mac devices. With the help of advanced scanning algorithms, the tool safely recovers data from external hard drive not showing up on Mac. The tool also supports data recovery of more than 300 file types such as photos, videos, PDF files, audio files, raw-images, excel files, etc. Download this tool now!
Recover data from external hard drive not showing up on Mac using Remo Recover Mac software:
Download and install Remo Recover (Mac) software > Launch the tool and click on Recover Volumes/ Drives > choose Volume Recovery > Select the external hard drive to be recovered > click on Advance Scan > Select the files which you want to recover and click Save button to restore the data on any location of your choice.
Watch this video to know how to restore data from unrecognized or corrupt external hard drive on Mac
Format external hard drive not showing up on Mac safely
Macbook Pro External Hd
Method 7: Reformat your unrecognized External hard drive to exFAT, Mac OS Extended (Journaled), FAT, or APFS File system
Macbook Pro Not Turning On
Before you reformat your external hard drive on Mac to fix the issue of not showing external hard drive on Mac, it is suggested to recover data from it using the Remo Recover Mac tool.
- Navigate to Disk Utility
- Select the external hard drive not showing up on Mac and click the Erase option
- Now, give a new name to your external hard drive (optional)
- Click the Format button to choose the format type you want to perform on it. (Select exFAT if you want to make sure it's compatible with PC and Mac, otherwise, Mac OS Extended (Journaled) is probably the best option)
- Click on the Erase optionand wait until the Disk utility function removes all the files present on the external hard disk and then reformat it with the selected file system.
However, by formatting the drive you would lose all the data on the disk. Hence, you would have to recover the data from the drive. The only way to recover files from the external hard drive not showing up on Mac is by using a professional data recovery software like Remo Recover Mac.
Conclusion
In most cases, selecting External disks under Show these items on the desktop fixes the issue. However, if the issue is related to the external hard drive corruption then, it requires formatting the drive with compatible Mac file systems like exFAT or APFS.
Remo Recover Mac, not only recovers data from corrupt external hard drive on Mac but also recovers data from formatted internal and external devices like external hard drive, SSD, USB, memory card, etc.
