Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.
In general, you can just open Disk Utility from the Utilities folder of your Applications folder. However, if your Mac doesn't start up all the way, or you want to repair the disk your Mac starts up from, open Disk Utility from macOS Recovery:
Mac Boot Repair Disk Download
In this example, the startup disk (APPLE SSD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). Your disk might not have a container, and it might have a different number of volumes. Repair volumes, then containers, then disks For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.
The order of repair in this example was Macintosh HD - Data, then Macintosh HD, then Container disk4, then APPLE SSD. When done, quit Disk Utility. If you used Disk Utility from macOS Recovery, you can now restart your Mac: choose Apple menu > Restart.
The OS X Recovery Disk Assistant lets you create OS X Recovery on an external drive that has all of the same capabilities as the built-in OS X Recovery: reinstall Lion or Mountain Lion, repair the disk using Disk Utility, restore from a Time Machine backup, or browse the web with Safari.
(1) DOWNLOAD BOOT-REPAIR-DISK,(2) Then burn it on a live-USB key via Rufus or Unetbootin. (do not burn it on CD/DVD if your PC came with Windows8/10)(3) Insert the Boot-Repair-Disk and reboot the PC,(4) Choose your language,(5) Connect internet if possible(6) Click "Recommended repair"(7) Reboot the pc --> solves the majority of bootsector/GRUB/MBR problems
Disk Drill for Mac supports all major file systems (HFS & HFS+, FAT/FAT32/exFAT, NTFS, EXT3/EXT4), and it works with internal and external storage devices alike. Included with it are multiple Mac HDD repair tools, including a disk monitoring tool that can alert you when your hard drive starts to show signs of failure.
While not nearly as popular as it used to be some 10 years ago, TechTool Protogo, now part of the TechTool Pro product line, still remains one of the best disk repair software Mac users should know about. Unlike many other disk repair tools for Mac computers, TechTool Protogo can bypass the operating system and run directly from a bootable diagnostic device, which is essentially a convenient disk repair toolbox with the right tool for just about any disk repair job.
DiskWarrior specializes in eliminating directory errors on Mac computers. Its signature approach to disk repair prevents data loss by creating an error-free version of the damaged data and comparing it with the original data to verify its integrity. This approach has earned DiskWarrior multiple awards over the years, and users who have been able to avoid a disastrous loss of data with this Mac drive repair software swear by it.
Data Rescue 6 for Mac has a lot in common with our favorite Mac disk repair software, Disk Drill for Mac. Both software applications are comprehensive data recovery solutions intended to recover permanently deleted files from a variety of storage devices. Just like Disk Drill for Mac, Data Rescue 6 offers two distinct data recovery methods: Quick Scan and Deep Scan. Last but not least, both data recovery solutions have been around for a long time and received many positive reviews from professional reviewers and customers alike.
Carbon Copy Cloner is the right Mac disk repair software to use when all other disk repair software applications fail. Its main feature is the ability to create bootable backups that can be stored anywhere and used in a minute. When a disaster strikes, you can simply boot from a Carbon Copy Cloner backup and repair the malfunctioning disk later.
When something goes wrong with your hard drive, you have several options on how to proceed. You can take the hard drive to a professional hard drive repair shop and ask them to fix the issue for you. You can also use hard disk repair software and attempt to fix the problem by yourself. Here are some reasons why the do-it-yourself approach is better:
After testing countless Mac disk repair software applications, we were able to narrow them down to just 10. Disk Drill for Mac earned the top spot thanks to its ease of use, excellent data recovery performance, and useful disk repair tools. Overall, Mac users can choose from a wide variety of disk repair tools, many of which are free or offer a trial version.
We tested dozens of these products and narrowed down our top choices down to the 7 best Mac repair tools. This article breaks down everything a user needs to know to choose the best Mac disk utilities for their needs.
To properly evaluate each Mac disk repair software, we broke down their main features, pros and cons, compatibility, and price. By the end of this article, you should have a clearer idea of what these tools can do for you, and which utilities to download depending on your situation.
Disk Utility is free and is the first tool you should try after restoring and backing up your data. Unlike Disk Drill, Disk Utility may directly repair the affected drive, and the process may cause data to get overwritten on the disk.
TechTool Pro 15 is the newest diagnostic and repair suite from Micromat. It has 20+ tools to speed up and protect your Mac, many of which are disk related. These include complete hardware and drive testing, disk speed measurement, and HDD repair.
If your computer does not support Dell SupportAssist OS Recovery, Dell provides operating system recovery image for Windows, Ubuntu, or Linux that was factory installed on your computer. You can download and use the Dell operating system recovery image to perform a clean installation, or reinstall Windows, Ubuntu, or Linux on your Dell computer. The Dell OS recovery tool provides an interface to quickly download and create a bootable USB drive to reinstall the operating system.
Dell SupportAssist OS Recovery provides a recovery environment with tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating system. When your computer is unable to boot to the operating system after repeated attempts, it automatically starts SupportAssist OS Recovery. This recovery environment enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state.
An error message may appear showing that the security settings do not allow it to use an external startup disk. If you bump into this message, follow the prompts to restart, then hold down Command+R to open macOS Recovery. Click the Utilities menu and choose Startup Security Utility. Enter the password you use to sign into this Mac. In the Allowed Boot Media section, change the option to Allow booting from external or removable media.
To check your unbootable hard drive, open Disk Utility. Click your hard drive volume and select First Aid. This will check your drive for errors and repair any that it finds. Click the Run button to trigger the scan and repair. Click done when the process finishes and return to the macOS Recovery screen.
Clonezilla is one of the most useful free hard drive repair software tools. It allows you to easily create full partition and disk backups, which can be deployed on other computers. Clonezilla supports far more file systems than most IT professionals can name, and it even features some basic boot repair tools.
GParted is a free, graphical partition editor that you can use to resize, copy, and move partitions without data loss or file corruption. You may want to shrink a partition to create space for another operating system or a backup partition. GParted is part of many other hard disk tools, such as Clonezilla or Partclone. It can also be downloaded from the official website as a small bootable GNU/Linux distribution for x86 based computers and used from a USB flash drive.
While Windows comes with a built-in hard disk repair tool capable of fixing bad sectors and file access issues caused by them, it pales in comparison with HDD Regenerator. This special-purpose hard drive repair tool has the ability to detect physical bad sectors on a hard disk drive surface and repair them a recovery technology called Hysteresis loops generator. Originally developed by Dmitriy Primochenko, Hysteresis can make unreadable data readable again, and HDD Regenerator makes it easy to apply it on Windows XP/Vista/7/8/10.
Trying to recover from a grub error so I'm downloading -repair-cd/. Sourceforge is absurdly slow, it's going to take an hour at least to download 500MB. Are there any better places to get this file? How about torrents (can't find it there, but maybe someone else knows a trick)?
During startup, your Mac performs a consistency check of the partition scheme and volume directory structure. If any problems arise, you can select the volume or disk you want to repair, then click First Aid.
Description: SystemRescue (formerly known as SystemRescueCd) is a Linuxsystem rescue toolkit available as a bootable medium for administrating orrepairing your system and data after a crash. It aims to provide an easy way tocarry out admin tasks on your computer, such as creating and editing the harddisk partitions. It comes with a lot of Linux system utilitiessuch as GParted, fsarchiver, filesystem tools and basic tools (editors, midnightcommander, network tools). It can be used for both Linuxand windowscomputers, and on desktops as well as servers. This rescue system requires noinstallation as it can be booted from a CD/DVD drive orUSB stick, but it can beinstalled on the hard diskif you wish. The kernel supports all important file systems (ext4, xfs, btrfs,vfat, ntfs), as well as network filesystems such as Samba and NFS. 2ff7e9595c
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