1. Hard Disk Repair Utility For Mac Pro
2. Best Disk Utility For Mac
3. Hard Disk Repair software, free download Mac
4. Mac Disk Repair
5. Disk Repair Utility For Mac

Repair Mac Hard Drive by Using First Aid in Disk Utility. Disk Utility is a free macOS application that can help you resolve Mac hard drive problems. When your startup disk is corrupt, your Mac won’t boot. In that case, you need to launch Disk Utility in macOS Recovery mode and repair the disk. Steps are as follows.

1. The Disk Utility on Mac is a very useful system tool for fixing specific disk problems. For example, you can run a disk check when your apps quit simultaneously, an external drive is not working properly, or your Mac won’t startup. Disk Utility will check the health of your hard drive and repair any disk errors if possible.
2. Disk Drill – Simple Yet Effective Hard Drive Repair Software. The first hard drive repair.

Bad sector is one of the biggest threats to hard disk and the data inside. Even new hard disks from trustworthy brands and sources could come with defects, let alone to say if your internal or external hard drive has served you over years. Don’t be surprised when you realize that your PC is running slow or with errors, like blue screen and random crash. They are just saying it is time to check and repair bad sectors on your hard disks.

Why You Need to Fix Hard Disk Bad Sectors

Bad sectors are usually caused due to the overloading of system files, or virus and spyware which creates troubles for the hard drive. This issue has evolved out to be a big nightmare for owners of computer or external hard drive.

The bad sectors of hard drive are responsible for the low-level performance and overheating issues for the PC because it is very hard to read the data from a corrupted hard drive with bad sectors in it. Some users have also reported that they are facing the issue of Blue Screen of Death (BSoD) error in their PC. This is really annoying and irritating for the users because they can even lose their whole data if those bad sectors present in the hard drive is not removed.

If your hard drive bears any physical damage, then for a complete solution of this issue, you need to replace the whole hard drive with a new one after backing up of data present in the previous hard drive.

Troubleshoot Hard Disk Issue Manually

There is an in-built disk check & repair tool in Windows 10/8/7. But that tool is only capable of recovering data up to some extent. At any point of time, if you feel that your PC is creating some real issues with the performance, then you have to check the whole hard drive instantly.

• Open This PC on Windows 10.
• Right click on the partition that may have bad sectors. If you’re not sure, just repeat the steps on each partition one by one.
• Choose Properties on the right-click menu, then navigate to Tools tab.
• Deploy hard disk checking and repairing on Error checking and Optimize and defragment drive.

The in-built tool is quite handy, but more often than not it can only boost computer performance slightly. If the issues are not resolved by your PC itself, then you are supposed to take the help of external software which will help you out in this task.

We have prepared a list of top 7 freeware which will help you check and repair your hard drive effectively. Compatibility may be an issue with a particular freeware, but we assure you that all of them are really very good to resolve this big issue. So, let’s have a quick look on all of them.

Important: Repairing bad sectors with the following tools will remove the data stored on the bad sectors. You’re highly suggested use Jihosoft File Recovery to recover data from hard disk drive that are missing or inaccessible before trying any of them.

Best 7 Bad Sector Repair Software for Free

1) Disk Genius

Disk Genius is one of the most popular hard disk management tools among IT professionals, but not everyone knows that it also features with bad sector checking and repairing functions. The feature is hidden in Disk menu on the top bar where you can see and open Verify Or Repair Bad Sectors.

Though it is just a sub-function, Disk Genius is still qualified as the top 1 free back sector check & repair tool. The conditions of hard disk sectors will be presented by blocks in various colors presenting a straightforward report, then you just need to click Repair button to start the automatic repairing of hard disk bad sectors. How to edit your pictures on picsart.

2) Data Lifeguard Diagnostic by WD

This software tool is probably one of the best software you will find to check and repair WD hard drives. Compatible with both Windows and Mac, Data Lifeguard will help you out to check all the sectors of your hard drive. Whether it is good or bad sectors, it will detect all the issues and create a detailed report. You can analyze the full report and take necessary measures to avoid data loss or other accidents.

Data Lifeguard Diagnostic supports WD Blue SSHD, WD Blue, WD Green, WD Desktop performance, WD S25, WD Xe, WD Black, WD Black SSHD, WD VelociRaptor, WD Purple, WD Ae, WD Red, WD Red Pro and much more to be listed. Check on the official website if your hard disk is not on the list.

3) SeaTools by Seagate

This tool developed by Seagate is a diagnostic tool that helps users determine the condition of your hard disk drive. SeaTools is from the well-known company in the industry of hard disk manufacture, but it also supports some non-Seagate hard disks. This software can be used in both Windows and Mac.

The user-interface is up to date which makes the job of the users very easy. That’s why Seatools is a pro to check the bad sectors of hard disk. In the whole PC scan, it will check all the files and sectors of hard disk whether it is internal or external,

4) Check Disk

Check Disk by Paehl is another powerful tool which can detect and fix the bad sectors of hard disk with an ease. This software comes with multi-language support system and that’s why users from all around the world choose this software for their personal use. The only drawback of this software is that it is exclusively available for the Windows users and not for Mac users. Otherwise, it is so called beast in this section to check the bad sectors of hard drive.

The full disk scan check will never let an issue to be left undetected. That’s why the name Check Disk really suits this software for sure. Almost all types of hard disks are compatible with this software. You can easily check on the website of Check Disk whose link is given above.

5) HDD Scan

Almost every type of SSD and HHD are compatible with this awesome software tool which is only compatible with Windows operating system. All types of defected and bad sectors present on the hard drives are fixed by this software automatically. You just have to give the command to run the full PC scan and the scan reports will get displayed in front of you within a few minutes depending on the size of the hard drive. All the reports can be saved in MHT format in the PC for the analyzation. This software is also well capable of changing some of the HDD parameter to fix the issues. If you use this software on your PC, then you will hardly suffer from any bad sector of hard disk at all.

6) Macrorit Disk Scanner

The real-time whole disk scan available in this software scanner will let you to find all the issues regarding the bad sectors. You can also track the status of the running scan process in a pop-up window. And as like other software tools, this software will also let you to download the file of scan process on your PC. PCs running on Windows OS are compatible with this software and moreover, almost every type of HDD and SDD is supported. So, at least try this software once.

7) Abelssoft Check Drive

This is our last pick in this list but the results which you can extract from this software are very helpful for users. As like other software tools we have mentioned, this tool will also serve you in the best possible manner. The real-time hard disk scan will let you to analyze all the bad sectors of hard disk very easily. This software will surely provide you the easiest way in which you can resolve all the issues and bad sectors present in the hard drive of your PC. Abelssoft check drive software is available in both paid and free versions. So, it is up to you that which subscription do you want for your PC.

Conclusion

This article concludes that bad sectors present in the hard drives need to be fixed as soon as possible because the consequence can cost your whole data. These bad sector repair tools will definitely help you in this task in the right direction. If you use any other software which can replace the software present in this list, then please inform us in the comments section.

Summary: This post introduces 5 solutions you can try when you are unable to mount an external hard drive on your Mac. Also, to avoid further data loss, you can use iBoysoft Data Recovery for Mac to recover lost data from this unmountable external drive first.

After you connect an external hard drive to your Mac, if everything is working fine, the operating system will automatically recognize, read, and mount your external drive, as well as show it in the Finder and on the desktop. However, if your disk gives up the ghost just like the users below, the external disk will not be showing up as normal. And if you check it in the Disk Utility, you will find your drive unmounted there.

'I was able to use my 3 TB external hard disk drive to backup my data last week. But now it doesn't mount after I migrate from Mojave to macOS Catalina. I dug around and tried a lot of stuff but still can't mount this external hard drive on my Mac. Can someone explain how to get this drive mounted so I don't lose the data?'

Why an external drive is not mounting on Mac?

There are numerous reasons for the external hard drive not mounting issue. The following are a few of the most common ones:

Hardware and connectivity issue

Most of the time, you can't mount your external drive on a Mac just because the connectivity is not in proper condition. This issue may be affected by a loose fitting, a broken USB cable, the wear on USB ports, etc. Sometimes, such connectivity issues could make your external drives keep disconnecting, or much worse, it would make your external hard drive unmountable eventually. Live casino direct free slot games. After all, it is essential to have a firm and tight connection.

Corrupted disk

Another possible reason for an unmounted disk may come from the problematic hard drive itself. Wonder how could it be? Well, it is possible that you're unable to mount a drive just because it is corrupted and unrecognizable by macOS. You can recall if your external drive has experienced one of these things: an unsafe removal when you are transferring files, an improper ejection, a sudden power outage, or even a virus infection. If so, your disk might be corrupted and it should be the culprit that you are unable to mount your external drive probably.

Incorrect formatting of the disk

In some cases, an unsupported file system will make your external drive unmountable. It is reasonable because if your Mac can't even read your disk's file system, how can you mount and access this hard drive on your Mac? This factor may not be as possible as the other causes, but it does happen.

Unable to mount external hard drives on Mac, how to fix?

Even though the reasons for a not mounting disk are different from case to case, certainly there are some things you can do to fix this issue. The following are five effective solutions to the 'external hard drives won't mount on Mac' issue, and some of them are just basic checks.

Solution 1: Check and fix connectivity issues

The first thing you can do is to make sure that your disk is connected to your Mac properly. Here are some things you can try.

• Reconnect your external hard drive to your Mac and ensure that it fits the USB port snugly.
• Connect the external hard drive to a different USB port or a different Mac. If you are not sure if there is a problem with the USB port/hub, you can plug a working external drive in to a port/on a hub, unmount and eject it. Then plug the unmountable external hard drive into that port/hub.
• Replace the USB cable or adapter in case that it was damaged or broken.
• Connect it to a Windows PC and see if the storage device is powered on and working.

Solution 2: Check the file system of the external hard drive

Well, if you don't know exactly what file system your disk is formatted with while your external hard drive can't be mounted now, you can go to Disk Utility to have a check if it is formatted with an unsupported file system. Remember that macOS is friendly with APFS and HFS+ and is in a neutral attitude with FAT, FAT32, and exFAT. However, it is a different story if you need to access and write to NTFS file system on Mac. By default, macOS only enables NTFS drive read support but disables write support. In this case, you can download a free NTFS driver for macOS to mount this external hard drive in read and write mode.

Still unable to mount the external hard drive on Mac? Then it should be some problems with the drive itself. You can try the following solutions to troubleshoot this problem.

Wait! Have you recovered your important data from this unmountable drive?

Before you go any further to fix this unmountable hard drive, you'd better make sure you have backed up your data on this drive to avoid data loss. The reason is that when your external drive won't mount, you lose the only access to all your files on this drive. In this situation, if you have important files on the external hard drive, any operations on the drive could overwrite the original data and cause irreparable data loss.

Forget to back up before? You can also use Mac data recovery software like iBoysoft Data Recovery for Mac to recover lost data from the unmountable external hard drives.

iBoysoft Data Recovery for Mac is afree external hard drive data recovery tool that enables you to recover lost data from external drives, especially when a hard drive is unmounted, formatted, inaccessible, unreadable, or corrupted. It's fully compatible with macOS Catalina 10.15/Mojave 10.14/High Sierra 10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7. In addition to external hard drive data recovery, it also can recover lost data from internal Mac hard drives, USB flash drives, SD cards, memory cards, pen drives, etc.

Tutorial to recover lost data from unmountable external drive on Mac with iBoysoft Data Recovery for Mac

Step 1: Download and install iBoysoft Data Recovery for Mac on Mac.

To use iBoysoft Data Recovery for Mac, you need to install this software on your Mac. You can just download the installation package and install it with no fuss.

Step 2: Launch iBoysoft Data Recovery for Mac.

After successfully downloading this program on your Mac, you can drag it to your Applications folder to install it, or you can double-click its icon to launch it.

Step 3: Select the unmountable external drive and click Scan button to scan all lost data.

When the Mac data recovery software is launched, all connected storage devices will be listed in the interface. You can see the name, file system, and space allocation of your hard drives and partitions. Locate your unmounted external hard drive, select it, and click 'Scan' to scan for lost data. Two scanning modes are allowed: Quick scan and Deep scan. Quick scan mode saves time for users and is applied when data is recently deleted. Deep scan mode finds more files at the cost of more time, and it's used when file system is corrupted or partition table is lost. Anyway, this software will automatically choose the most efficient way to scan for files according to the disk condition.

Step 4: Preview the searching results, choose files you need, and click Recover to get them back.

With the preview feature, you can check whether your files on this unmountable disk are in a good condition or not. It saves time and money for users. The software will show if your file is corrupted so that you would not waste energy to recover it or pay for this data recovery product.

Step 5: Have a check to ensure you have got all lost data back.

Now you either have a copy of a data backup in hand, or have recovered your important files with iBoysoft Data Recovery for Mac. Therefore, you can go ahead to repair this unmounted external drive without worrying about data loss.

Solution 3: Repair the external hard drive with Disk Utility

When an external hard drive is not working properly, you can use the built-in disk repair tool - First Aid to check and repair disk errors.

Step 1: Launch Disk Utility.

Step 2: Choose the unmountable external drive on the left sidebar.

Step 3: Select First Aid in the top center and click Run.

Solution 2: Repair the external hard drive with Terminal

Sometimes, Disk Utility may not function as desired. Fortunately, you can still try to repair the corrupted external hard drive with Terminal.

Step 1: Go to Applications > Terminal

Step 2: Enter: diskutil list (This will list out the available volumes).

Step 3: Check the volume identifier from the table that appears.

Step 4: Enter:diskutil repairVolume [diskvolume identifier]. For example, if the volume identifier of an external hard drive is disk2s, you should enterdiskutil repairVolume disk2s.

Solution 3: Reformat the external hard drive

If yourexternal hard drive can't be repaired with Disk Utility and Terminal, the file system of this drive might be seriously corrupted. The only way to fix this unmountable external drive is to reformat it.

Warning: Reformatting will erase all data on the external hard drive, so please make sure you have backed up important data.

1. Launch Disk Utility from Utilities.

2. Click the icon of the unmountable external drive on the left part of the window.

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3. Click the Erase function on the top of the Disk Utility window.

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4. Complete the related information (name, format, scheme), then click Erase button.

Conclusion

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When you can't mount an external hard drive on your Mac, you can try the 5 methods introduced in this post. But no matter which solution you are going to try, to avoid data loss, you are always advised to back up your files or recover your data from this unmountable drive first with iBoysoft Data Recovery for Mac.

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But if unfortunately, none of these solutions can make your hard drive work again, or your disk is not even detected or showing up in Disk Utility, then this drive might be physically damaged. Under this situation, you should send it to a local disk repair service and see if they can help.

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Good luck!