Solutions: How to Fix An External Hard Drive Won't Mount Error on Mac External hard drive is plugged by mistake.External hard dive is unmounted or not correctly mounted on Mac.File system of the external hard drive is not supported by Mac.Internal errors - file system error, outdated drivers, unknown errors, etc.Problematic connection - USB port, cable were broken, unusable, or low power supply.Causes: Why Is My Mac Not Mounting External Hard DriveĪccordingly, it could be any one of the listed factors that prevened your Mac not mounting external hard dives:
What are the causes that block your external hard drive from mounting on a Mac computer? Let's find out the reasons.
The external hard drive shows up in Disk Utility but won't mount. Access is denied, the drive becomes not accessible. When your external hard drives, USB flash drives, or even other types of storage devices are not mounting on Mac computers, the devices will come with one or some similar symptoms as listed here. Error: External Hard Drive Not Mounting on Mac (Monterey, Catalina, Big Sur) With this error on your Mac? No worries.įollow us and learn how to get rid of this issue, making external hard drive mounting and working on Mac again without losing any data. This page lists the causes of external hard drive not mounting and shows you how to fix Mac unable to mount external hard drive error successfully. Full stepsĮxternal hard drive not mounting on Mac may result in access denied, disk not showing/not recognized, etc., errors. Connect external hard disk to Mac and open Disk Utility Step 2. Format External Hard Drive in Disk Utility Connect the external hard drive to Mac correctly Step 2. 
Click "I already have a license" to unlock this software. Mount and Enable External Hard Drive via EaseUS NTFS for Mac Connect your external hard drive into Mac correctly Step 2.
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