Mac Hard Drive Failure | How to Diagnose and Fix

If your Mac hard drive is starting to malfunction — slow performance, error messages, or strange noises — it may be failing. This guide covers the Mac hard drive failure symptoms, how to check drive health with SMART, nine proven fix methods, and how to recover data before it's too late.

Mac Hard Drive Failure Symptoms

How can you know if your Mac hard drive is failing? Some common symptoms indicate the problem. If you notice any of the signs below, a Mac hard disk failure might be at play, so repair it before it causes further damage to your computer. If you Mac cannot recognize external hard drive, check >>: How to Fix Mac Won't Recognize External Hard Drive? How to Fix "Could not Mount Disk2s2 after Erase"?

The Mac hard drive failure symptoms include:

How To Check if Your Hard Drive Is Failing on Mac

You can run a SMART test if you're unsure what is wrong with your HDD or SSD on your Mac. SMART (Self-Monitoring, Analysis, and Reporting Technology) analyzes your hard disk's health on HDDs, SSDs, and eMMCs — run it regularly to catch problems before failure.

Follow these steps to check if your Mac HDD or SSD is failing:

1. Go to Applications > Utilities > Disk Utility on your Mac.

   

2. Click your hard disk in the left sidebar and check the SMART status in the table.

   

3. Your Mac hard disk is healthy if you see Verified under the SMART status. If it says Failing, your hard drive is failing.

How To Fix Hard Drive Failure on a Mac

Now that you've learned how to perform Mac hard drive failure data recovery with or without a backup, it's time to fix the failing Mac hard drive. We've prepared nine ways that have proven the most successful in resolving hard drive failure on Mac.

Method 1. Fix Mac Hard Drive Failure Using First Aid

First Aid is Disk Utility's built-in repair tool — free and the easiest fix for a corrupted HDD or SSD on your Mac:

Follow these steps to fix your failing hard drive using First Aid:

1. Connect your hard drive to your Mac (if it's an external one).
2. Go to Finder > Applications > Utilities > Disk Utility.
3. Click your hard drive in the left sidebar.
4. Click First Aid at the top of the screen.

   

5. Click Run to confirm it.

   

6. Wait for the repair to finish and click Done.

   

Method 2. Reinstall Your Disk Drivers

If your hard drive isn't recognized or won't mount, its driver settings may be corrupted. On macOS you can't manually reinstall drivers (the system manages them), but you can re-mount the drive and reset system settings — the fixes below are the macOS equivalents.

Important: Unlike Windows, macOS manages its own drivers (protected by System Integrity Protection) — there are no user-installable disk drivers. If your drive isn't recognized, the steps below (re-mount + NVRAM reset) are the macOS-equivalent fixes.

Follow these steps to re-mount your disk on Mac:

1. Open Finder, click Go, and select Go to Folder.

   

2. Type the location of your disk and press Enter.

   

3. Safely remove your hard drive from your computer and wait a few seconds before reconnecting it.
4. Open the Finder app.

   

5. Type Disk Utility in the upper-right corner.

   

6. Select your hard drive in Disk Utility's left sidebar and check if it's mounted. If not, click Mount at the top of the screen to manually mount it.

   

Method 3. Format Your Hard Drive

Formatting erases all files and viruses, which also clears disk corruption — but you lose your data, so back up first (or recover with Wondershare Recoverit afterwards).

Follow these steps to format your failing Mac hard drive:

1. Open Disk Utility on your Mac computer.
2. Find and click your failing hard drive on the left sidebar.
3. Click Erase at the top of the screen.

   

4. Select the name, format, and scheme. Click Erase to format your failing hard drive.

   

Method 4. Repair the Mac Hard Drive Failure Using the FSCK Command

If First Aid and formatting didn't fix your disk, try FSCK (File System Consistency Check) — a command-line repair utility for when you need an advanced solution.

Note: FSCK can't run inside macOS — you must boot into Recovery Mode: on Apple silicon, press and hold the power button until "Options" appears; on Intel Macs, restart and hold Command + R (the old Command + S single-user mode is deprecated on modern macOS).

Follow these steps to fix your failing hard drive using the FSCK command:

1. Boot your Mac into Recovery Mode (Apple silicon: hold power; Intel: hold Command + R).
2. From the Recovery menu, choose Utilities > Terminal.
3. Type the following command: /sbin/fsck -fy. Press Enter.

   

4. Wait for FSCK to check and repair the errors on your hard drive.
5. Once it completes, type reboot and press Enter.

Method 5. Fix the Mac Hard Drive Failure Using the Terminal

You can also repair your disk from Terminal — another built-in macOS utility, though its command-line interface takes some getting used to.

Follow these steps to fix your MacBook or iMac hard drive failure in the Terminal:

1. Type Terminal in the search bar and open it.

   

2. Type the following command: diskutil repairVolume /Volumes/X (replace X with your hard drive's name). Press Enter.
3. Wait for the process to finish. If the Terminal repairs your hard drive, it will notify you with a success message.

Method 6: Run Apple Diagnostics to test hardware components

Apple Diagnostics tests all hardware components — memory, processors, and storage — and reports error codes that pinpoint the failing part, catching drive problems that software checks miss.

When to use this method:

• Your Mac won't start up properly or crashes randomly
• You suspect hardware problems beyond just the drive
• Other diagnostic methods haven't found the problem

Steps:

1. Shut down your Mac. Intel Macs: press and hold the D key while pressing the power button until the diagnostics screen appears. Apple silicon: hold the power button, click Options, and choose Diagnostics.
2. Follow the on-screen instructions to run all tests, then note any error codes related to storage devices.

Method 7: Reset NVRAM and SMC to fix startup issues

NVRAM stores startup-disk selection and display resolution; SMC controls power management, fans, and low-level functions. When corrupted, they can stop your Mac recognizing the drive or cause power issues — resetting them is safe and won't delete your files.

When to use this method:

• Your Mac doesn't recognize the startup drive
• Startup is very slow or hangs at the Apple logo
• The system has power or thermal management issues

Steps:

1. NVRAM (Intel Macs only): restart while holding Option + Command + P + R for 20 seconds, then release all keys and let the Mac start normally. Apple silicon Macs reset NVRAM automatically — no action needed.
2. SMC (Intel Macs only): shut down, hold Shift + Control + Option + power for 10 seconds, then release and start normally.

Method 8: Check for firmware updates and install them

Outdated firmware can cause compatibility issues that mimic drive failure. Apple releases firmware updates to fix known problems and improve drive communication — especially important on newer Macs with SSDs, where old firmware may not handle new drives properly.

When to use this method:

• You recently installed a new drive or upgraded storage
• Problems started after a major MacOS update
• Other methods haven't solved persistent issues

Steps:

1. Go to System Settings > General > Software Update and install any available firmware updates for your Mac model.
2. Restart your Mac after updates are installed and test if the drive problems are resolved.

Method 9: Replace the hard drive if physical damage is detected

When other methods fail and you hear clicking sounds or see physical-damage signs, replacing the drive is the definitive fix. It requires technical skills and tools — difficulty varies by model (some drives are easy to reach, others need deep disassembly). Always use anti-static precautions.

When to use this method:

• The drive makes clicking, grinding, or unusual noises
• SMART status shows "Failing," and other methods don't help
• The drive isn't recognized by Disk Utility or Apple Diagnostics

Steps:

1. Purchase a compatible replacement drive for your Mac model and gather necessary tools (screwdrivers, anti-static strap, etc.).
2. Follow your Mac model's specific disassembly guide to remove the old drive and install the new one, then reinstall macOS.

Causes of Mac Hard Drive Failure

Hard disks are delicate and fail for many reasons — some logical, some physical. The most common causes include:

How To Recover Data From a Failing Mac Hard Drive

Corruption from a failing drive can make files unreadable, but they're usually not gone for good — recovery depends on whether you have a backup: restore from Time Machine if you do, or use a data recovery tool if you don't.

Option 1: Use a Data Recovery Tool for Mac

Wondershare Recoverit for Mac recovers lost files from any hard drive on a MacBook or iMac — covering file system errors, virus attacks, bad sectors, and other failure scenarios:

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• Recovers data from 2000+ storage media, including HDDs, SSDs, USB drives, SD cards, etc.
• Enables recovery of data lost due to formatting, disk corruption, system crash, and more.
• It works with all popular file systems, such as NTFS, FAT, HFS+, and APFS, among others.

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Follow these steps to recover data from a failing hard drive on Mac without a backup:

1. Connect your failing hard drive to your Mac computer if it's external.
2. Install and open Wondershare Recoverit.
3. Find and click your failing hard drive under Hard Drives and Locations.

   

4. Recoverit scans your failing hard drive — monitor the progress at the bottom of the screen.

   

5. Preview the recovered files once the scan is complete. Click Recover and save the retrieved files to a different location.

   

Option 2: Restore Time Machine Backups

Time Machine backs up your Mac automatically with no extra software — if you have a backup, restoring files is quick:

Follow these steps to restore files from a Time Machine backup on MacBook Air, MacBook Pro, or iMac:

1. Connect your Time Machine backup disk to your Mac device if it's external.
2. Click the Apple logo and select System Preferences.

   

3. Open Time Machine.

   

4. Tick the checkbox next to the Show Time Machine in the menu bar option.

   

5. Click the Time Machine icon in the menu bar and select Enter Time Machine.

   

6. Choose the hard drive folder you wish to restore. That will open numerous windows on top of one another. The further back you go, the more time has passed since that backup. Therefore, pick one of the recent Time Machine backups and click Restore.

   

Conclusion

Hard drives fail for many reasons, but you can catch the warning signs early. Run the SMART test to check drive health, then try the nine fix methods above (First Aid, FSCK, Terminal, diagnostics, NVRAM/SMC reset, firmware updates, or replacement). If failure causes data loss, restore from Time Machine — or use Wondershare Recoverit to recover lost files from the failing drive.

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