It is common that Mac fails to mount a hard drive. Many users have been subject to this issue before. It actually can result from many factors. So, this article will expose 5 main causes as well as solutions for this problem.
Nov 14, 2019 Most of the time, when you connect an external hard drive to your Mac’s USB port, you soon see it mount on the desktop. Apple likes to ensure these are easy to find, so they also appear in the Finder in the left-hand column under Devices, since Mac’s treat them the same way as another computer. Furthermore, there are likelihoods that the Mac operating system crashes. Hence, the Mac cannot mount your hard drive. Solutions: 1. Kill Viruses. Based on the first reason above, you need to kill the potential viruses. Launch the anti-virus software on your Mac and then make it scan the disk or the entire Mac to remove viruses.
Hard drive is the most important part of a computer in that it’s used to store data, supporting computer to work in a normal manner. Therefore, if the internal hard drive is unable to be mounted on Mac system, not only will the system be unable to boot, but also you will be incapable of accessing the drive data. So, this issue is admittedly knotty and annoying. But don’t worry. In the followings, we will unveil its 5 primary reasons and solutions.
1. Virus Attack
There may be chances that your Mac system or the hard drive itself is attacked by viruses or malware, causing data corruption like corrupt PST. Hence, your Mac is unable to mount the hard drive. This isn’t rare in that viruses have become more and more sophisticated nowadays.
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2. Disk Utility Failures
In addition, this problem may be caused due to Disk Utility faults. As we all know, not only can this tool fix disk issues, but also it can format or partition hard drive. Hence, if you used it to partition drive but failed, then the drive may be unable to be mounted.
3. Catalog File Corruption
Moreover, catalog files are extremely important as it is responsible for storing the record files of partitioned volumes. Therefore, if any catalog file becomes corrupt, Mac will not be able to get the volume information, such as volume size location, description of volume content, etc., thereby failing to mount the drive.
4. File System Damage
File system is responsible for organizing and storing the data in hard drive. Thus, if the drive file system is compromised, the master file table will be impacted in a direct manner. At that time, Mac will definitely fail to mount the disk drive.
5. System Malfunctions
Furthermore, there are likelihoods that the Mac operating system crashes. Hence, the Mac cannot mount your hard drive.
Backup Mac To External Hard Drive
1. Kill Viruses
Based on the first reason above, you need to kill the potential viruses. Launch the anti-virus software on your Mac and then make it scan the disk or the entire Mac to remove viruses.
2. First Aid
“First Aid” is a repair feature in Disk Utility. You can use it to have a try. Insert a Mac OS installation disk and then reboot Mac while holding down the “C” key. In installer menu, select “Disk Utility” and turn to “First Aid” tab. Later, choose the drive and hit “Repair” option.
3. Quit “fsck_hfs” Alike
Many senior users may have noted that as shown in Activity Monitor, a process called “fsck_hfs” or “fsck_exfat” always auto runs on Mac startup. As long as, this process is quitted, the issue will disappear. You can try this solution, too.
4. Reset NVRAM
NVRAM is a small portion of memory used to store some settings for quick access on Mac system. Thereby, you can attempt to reset the NVRAM. Reboot your Mac and hold down the “Command + Option + P + R” key buttons. After resetting, you can retry to mount the drive on Mac.
5. Use Third Party Tool
What’s more, there are multiple utilities that can repair such an issue. Hence, you can download a trustworthy and experienced tool to have a shot.
Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including sql fix and outlook repair software products. For more information visit www.datanumen.com
External hard drives are resourceful as they hold large volumes of data and are portable as well. While transferring the files to the computer you might have found that the external hard drive is not showing up on Mac. The problem could be because of faulty cable or connector, hidden drive, physical damage to the drive or any other reason. Regardless of the reasons for the problem, by following the information given below the external hard drive will show up on Mac so that the files can be transferred.
What to do if Mac does not recognize external hard drive?
Here are few things that you can check before performing any troubleshooting steps over the computer.
- Check if the external hard disk is properly connected to the computer
- Look out for any damages on the USB connector wire, or use a different USB cable and check if the drive is working
- Plugin the drive to a different USB port, to check for any hardware issues
- Try connecting the external hard drive to a different Mac system, sometimes there might be problem on you Mac USB port.
- Lastly, restart the computer. This will reset few system settings to default and ensure any issues are resolved in simple way.
In most of the cases, the above-mentioned tips will help you resolve issues if external hard drive not shown on Mac. Despite performing the above steps if the external hard drive not showing on Mac, continue reading the further section.
Make the external hard drive visible on Finder:
One of the reasons why the external hard drive is not showing on Mac is because the drive might be hidden. By unhiding the external hard drive, you will be able to find the external hard drive on mac.
- Open a new Finder window
- Go to Preference and select General
- Under “show these items on the desktop” check the External disks option
- Click on the Sidebar tab and select the External disk and Hard disk under “show these items in the sidebar”
Repair external hard drive using Disk Utility:
When Mac does not recognize the external hard drive, follow the instructions to ensure external hard drive is recognized on the computer.
- Navigate to System Preferences >Disk Utility
- If your external hard drive appears to be in grey, right click on the drive and select Mount
- If drive is not accessible, then choose the drive and click on First Aid
- After running the First Aid, Click Repair Disk in case Disk Utility detects any issues.
If your Mac fails to repair the drive, it could be possible that the drive must have turned RAW. The reason for this could be because a file system is the registry the holds the information of the files present in the drive, without a proper file system the Mac would not recognize the drive on the computer. Therefore, you need to reformat the drive with APFS, HFS+ or ExFAT file systems in order to get the drive detected on Mac and access the files. This can be done by installing a fresh copy of the latest macOS Catalina.
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 the external hard drive is by using a professional external hard drive recovery software. Follow the instruction in the next section to retrieve data from your external hard drive.
Remo Recover is a special tool that is designed to recover data from external hard drive that is corrupt. With the help of advance scan algorithm, the software will safely recover data from any external hard drive not showing up on Mac. The tool also supports data recovery of more than 300 file types. Download and install the software for free now.
Recover data from external hard drive without formatting
Download and install the Remo external hard drive recovery software and follow the steps.
Launch the application and click on Recover Volumes/ Drives >choose Volume Recovery> Select the external hard drive to be recovered> click on Advance Scan > choose the type of file to be recovered and click Next> Select the recovered file and click on Preview at the top right corner to validate> Click Save and browse for a location to save the data.
If your Mac fails to repair the drive, it means that the drive must have been formatted from a file system, which Mac cannot recognize or the drive is really broken. If it’s the case of former, try connecting it to a PC. If its latter, follow this guide to get back data from external hard drive on Mac. If you don’t want data from the drive, you can simply erase and format it.