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An application may write into the file system thereby causing corruption on the disk.

The following situations may damage the storage drive’s file system, which may not get fixed with Disk Utility’s First Aid feature: The Mac’s file system allows storage and retrieval of data to and from the storage drive. The container can have multiple volumes with their file systems. The APFS container comprises Container superblock, Checkpoint area, Space manager area, and storage for objects and file data. Your Mac external hard drive contains reserved space for GUID Partition Table, EFI System Partition, and APFS Container.

This logical damage of the external hard drive makes the drive and its stored data inaccessible on Mac. Why Mac External Hard Drive Turns Inaccessible?Īt times, an unexpected event corrupts the partition table, EFI partition, or APFS/HFS file system of the Mac external storage drive.

Also, you can recover data from a corrupt external drive on Mac.īut before learning the repair and recovery methods, know why a Mac external hard drive turns inaccessible, appreciate the Mac file system and its importance, and learn the reasons that lead to file system corruption. Don’t worry, you can use alternative methods to repair your Mac external hard drive in case Disk Utility doesn’t work. But sometimes, Disk Utility’s First Aid fails to repair your external hard drive and the drive’s data remains inaccessible. Recover Inaccessible Data Using Mac Data Recovery Softwareĭisk Utility is a useful storage drive management software that allows you to perform the external hard drive repair task with ease by using First Aid. Use FSCK Command in Single-User Mode to Fix External Driveģ. Use FSCK Command in Terminal to Repair External Hard DriveĢ. Summary: In this blog, we’ll share a variety of alternative methods to repair your Mac external hard drive in case Disk Utility fails to fix the drive.ĭownload the free-to-try Mac data recovery tool to recover data from an external hard drive.