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Maximize data recovery from an Unmounted Mac external drive. How?

Verify unmounted Mac hard drive


Connect the unmounted external hard drive to Mac and go to Disk Utility to verify if the external drive is listed or greyed-out.


Select & Press ‘Mount’ button in the Disk Utility for your unmounted external hard drive.

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Try Stellar Data Recovery Professional for Mac if you are unable to mount the drive. Recover unmounted drive’s data immediately.

Steps to Recover Data from Unmounted External Drive

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Mac Unmounted Drive Recovery Software Features


Unmounted Drive Recovery

Seldom, your external hard drive fails to mount on your MacBook Air, iMac, or Mac Pro. This can be due to the corruption of the file system that allows macOS to access and manage the storage drive. As a result, all the drive’s data turns unreachable. You fear you have lost your cherished photos, videos, and documents forever. Take it easy; Stellar Data Recovery Professional for Mac is at your rescue with its powerful data recovery mechanism to deep scan the unmounted external storage drive and recover those isolated data.

Note: The unmounted drive must be listed or greyed out in Disk Utility for data recovery via Stellar’s software. Read the Case Study


Mac Hard Drive Recovery

Data loss incident from a Mac hard drive cannot be evaded. But regular backup guarantees that you restore your lost data from the backup drive whenever such mishap occurs. But, even the backup cannot rescue if it is not up-to-date when you lost your critical files. Then, only a Mac hard drive recovery software can help get back your gone data. This application recovers data from a variety of data loss situation, viz. formatting of drive, permanent data deletion, emptying of Trash, partition loss, virus infection, and so forth.


Restore Unrecognized Drive

Occasionally, an external hard drive won’t get recognized on macOS due to incompatible file system format of the drive. After checking the status of the storage device by using Disk Utility, you may find it in grey. Rest assured; Stellar‘s data recovery tool for Mac recognizes numerous file system formats. This allows the tool to scan the unrecognized hard drive even from an inconsistent file system and retrieve all the unreadable data.


Recover Drive Not Detected

Your external hard drive when connected to your Mac may not get detected due to several reasons. Reconnecting the drive to a different port, changing the connection cable, or using a different Mac may solve the non-detection issue. If the drive is not visible in Disk Utility, then it has a hardware issue, and you may need to contact our service team. Else, the drive has undergone logical damage. Try out the DIY Stellar Data Recovery Professional software to retrieve the data present on the external Mac drive.


Recover Not Found USB

Data loss can occur from a USB drive due to drive corruption. When you try to connect the corrupt USB drive to your Mac, macOS may throw the message “USB Drive Not Found”. And may even prompt you to erase the drive. Don’t erase the drive, instead use Stellar Data Recovery Professional for Mac. The software scans the not found USB drive, shows the preview of the scanned files, and allows saving the recoverable files on a distinct storage destination.


Recover Not Showing SSD

At times, Finder or Desktop may not show up the connected external solid-state drive on your Mac. It may even turn up in grey when you try to view the SSD in Disk Utility. Stellar Data Recovery Professional for Mac has the built-in feature to scan and recover data from the APFS formatted SSD. By using the tool’s advanced data recovery method, you can salvage lost data from a SSD that is not showing up on Mac.

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Software Support for
Devices / Drive Types / Brands



iMac®, MacBook®:

Earlier or Late 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, and 2008.

Mac mini

Mac Mini®:

Earlier or Late 2018, 2014, 2012, 2011, 2010, 2009.

Mac Pro®:

Earlier or Late 2017.

Drive Types

Startup disk, i.e. Macintosh HD, FireWire, Fusion, Time Machine, Partition, USB Drive, mSATA, SSD, PCIe-SSD.


Western Digital®, Toshiba®, Samsung®, Lexar®, Seagate®, Maxtor®, LaCie®, Kingston®, Transcend®, SanDisk® & more.