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. External hard drive not mounting on Mac may result in access denied, disk not showing/not recognized, etc., errors.
