{"id":33215,"date":"2021-02-19T12:16:58","date_gmt":"2021-02-19T12:16:58","guid":{"rendered":"https:\/\/www.cleverfiles.com\/howto\/?p=33215"},"modified":"2025-03-17T16:15:26","modified_gmt":"2025-03-17T16:15:26","slug":"how-to-fix-corrupted-hard-drive-on-a-mac","status":"publish","type":"post","link":"https:\/\/www.cleverfiles.com\/howto\/fix-corrupted-hard-drive-mac.html","title":{"rendered":"How to Fix Corrupted Hard Drive On a Mac"},"content":{"rendered":"

A corrupted hard drive on a Mac can suddenly turn a normal day into a crisis. As one Reddit user described their experience:<\/p>\r\n

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“My external hard drive suddenly disconnected and won’t reconnect. It doesn’t show up in Disk Utility, though it appears in system reports. There’s about 8 years of irreplaceable photos stored there – my only backup after my phone was stolen. This is a truly devastating situation.”<\/i><\/p>\r\n<\/blockquote>\r\n

If you’re facing a similar problem with a corrupt Mac hard drive, then you need to address it as soon as possible otherwise important data may become permanently lost. This guide will help you understand what’s happening and explain both how to fix a corrupted hard drive on Mac and recover missing data from it.<\/p>\r\n

<\/span>What Are the Symptoms of a Corrupt Mac Hard Drive?<\/span><\/h2>\r\n

A corrupted Mac hard drive can start showing a variety of more or less obvious symptoms, with some associated only with internal drives and some only with external drives.<\/p>\r\n

Note<\/b>: For situations where your Mac won’t boot at all, you might need advanced techniques to recover data from a dead MacBook<\/a>.<\/p>\r\n

<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Symptom<\/td>\r\nExplanation<\/td>\r\nRecommended solutions<\/td>\r\n<\/tr>\r\n
You can’t access or transfer files from the corrupted drive<\/td>\r\nThe operating system can’t properly locate or read certain file segments on the corrupted drive.<\/td>\r\n\r\n
    \r\n\t
  1. Use data recovery software<\/a> ✅<\/li>\r\n\t
  2. Use Disk Utility<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Applications unexpectedly quit<\/td>\r\nThe file system can’t read or write data properly, causing apps to freeze or crash without warning.<\/td>\r\n\r\n
    \r\n\t
  1. Repair with Disk Utility<\/a><\/li>\r\n\t
  2. FSCK Command<\/a><\/li>\r\n\t
  3. Reboot in Safe Mode<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Frequent system freezing, slow boot times, or frequent restarts<\/td>\r\nThe Mac struggles to load system files or apps from a damaged disk, leading to freezes or the spinning wheel.<\/td>\r\n\r\n
    \r\n\t
  1. Disk Utility<\/a><\/li>\r\n\t
  2. FSCK Command<\/a><\/li>\r\n\t
  3. Safe Mode<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Mac refuses to start<\/td>\r\nThe corruption has spread to essential system files, preventing a normal boot.<\/td>\r\n\r\n
    \r\n\t
  1. FSCK Command<\/a><\/li>\r\n\t
  2. Time Machine Restore<\/a><\/li>\r\n\t
  3. Professional Recovery Service<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Disk name is grayed out in Disk Utility<\/td>\r\nThe drive is recognized by macOS but is unmountable or inaccessible due to file system corruption.<\/td>\r\n\r\n
    \r\n\t
  1. Disk Utility<\/a><\/li>\r\n\t
  2. FSCK Command<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Finder or Desktop not showing external drives<\/td>\r\nSometimes external disks are hidden by Finder settings, or the drive is unmountable if badly corrupted.<\/td>\r\n\r\n
    \r\n\t
  1. Check Finder Settings<\/a><\/li>\r\n\t
  2. Connect the Drive to Another Computer<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Repeated “Disk Not Ejected Properly” errors<\/td>\r\nThe drive may disconnect randomly due to power issues, cable faults, or disk corruption causing sudden ejections.<\/td>\r\n\r\n
    \r\n\t
  1. Connect Directly \/ Bypass USB Hub<\/a><\/li>\r\n\t
  2. Disk Utility<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
Strange noises or excessive vibrations from a mechanical HDD<\/td>\r\nClicking, grinding, or buzzing from a traditional spinning hard drive can indicate physical damage or failing internal components (less applicable to SSDs).<\/td>\r\n\r\n
    \r\n\t
  1. Professional Recovery Service<\/a> (if physical damage is suspected)<\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
S.M.A.R.T. errors or warnings<\/td>\r\nThe drive’s built-in diagnostics are reporting bad sectors, reallocated blocks, or other hardware-level problems.<\/td>\r\n\r\n
    \r\n\t
  1. Disk Utility<\/a><\/li>\r\n\t
  2. FSCK Command<\/a><\/li>\r\n\t
  3. Professional Service<\/a><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

    <\/div>\r\n

    <\/span>5 Important Steps Before Fixing a Corrupted Mac Hard Drive<\/span><\/h2>\r\n

    Whether you repair the corrupted hard drive or retrieve your information first matters. I always recommend that your first priority should be to recover data from a corrupted external or internal hard disk on a Mac before attempting repairs of your Mac corrupted hard drive because the remaining lifespan of the drive is unpredictable.<\/p>\r\n

    📝 Note<\/b>: Ideally, you should create a complete backup image of the disk<\/a> first so that you can recover your data even if the corruption gets worse and the drive stops working.<\/div>\r\n

    <\/span>Step 1:<\/span> Recover Data from a Corrupted Mac Hard Drive<\/span><\/span><\/h3>\r\n

    As explained above, your first step should be to recover damaged hard drive Mac<\/a> data. To do that, you need data recovery software capable of two things:<\/p>\r\n