Could not unmount disk mac5/20/2023 ![]() ![]() For more technical information see Microsoft documentation - here. This is typical and not an issue when using the drive as NTFS. It is shown as Microsoft Reserved in Disk Utility. This volume exists because the drive is set up for Windows using GUID/ NTFS. What is that 134.2 MB volume on the drive? Which is why selecting the non-indented entry is important when formatting the drive. This is important because when erasing the drive you will get different options depending on whether you have the volume or disk selected. The indented entries directly below are the volumes (partitions). The non-indented entry is the physical disk which typically has Media in the name. ![]() You should see at least two, sometimes three, entries for your drive depending on how it is formatted. If you are running 10.12 or 10.11 this step is not required as the option is not available. Change the view to Show All Devices instead of the default which is Show Only Volumes. If you are running macOS 10.13 (High Sierra) or later it is important to change the view in Disk Utility. Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting. Not sure what version you are using? Click here to determine your version of macOS. This article applies to the following versions of macOS: The following is not an exhaustive list of error messages, so you may not find your specific error here. If First Aid keeps reporting "Unable to unmount volume for repair" when scanning your external drive, you can do it in macOS Recovery.This article covers some of the common error messages and questions you might encounter while using Disk Utility. Since OS X 10.7 Lion, every Mac has a recovery partition that users can turn to when they are having issues with the regular macOS. To get rid of the program, look for the uninstall feature in the preferences or check the website for a guide. Please note that simply dragging the software to Trash doesn't clear the installation files on your system fully. If it doesn't have an update yet, you should completely uninstall the software from your Mac. In this case, you need to check and install the available updates to the software on the manufacturer's official website. : (-69673)." if either the software or the firmware isn't working properly, especially after a macOS update. You may encounter "Unable to unmount volume for repair. Don't forget to replace disk_identifier with yours.Äiskutil unmountDisk force /dev/disk_identifier Uninstall the drive manufacturer's softwareÄo you have any of the drive manufacturer's software installed on your Mac that allows you to unlock, maintain, or back up to or from the drive? When such software exists, there's often a related firmware on the drive. To do it, execute the command below in Terminal. ![]() This way, you can terminate any background processes that are secretly using the drive. If you can't unmount the drive on Mac with the aforementioned methods, you should force unmount the drive in Terminal. If, instead, the command returns the error, " Error: -69673: unable to unmount volume for repair," you need to force unmount the disk. Now, the drive will be grayed out in Disk Utility and you can re-run First Aid to check whether the issue is gone. Once it's done, Terminal will report back that the targeted disk or volume is unmounted. diskutil unmountDisk /dev/disk_identifierSuppose the identifier of the drive is disk2, then the command will be diskutil unmountDisk /dev/disk2. Execute the following command to unmount the drive in question.Note down the disk identifier of the drive that First Aid can't unmount on Mac.Run the command below to list all drives connected to your Mac.Open Terminal from the Applications > Utilities folder.Nevertheless, if your drive is exhibiting behaviors, such as: : (-69673)." If your drive is in good condition, it likely is actively used by other programs or processes, which are preventing First Aid to unmount it. There are several reasons for "Unable to unmount volume for repair. Recover lost files when facing 'Unable to unmount volume for repair' on Mac How to fix 'Unable to unmount volume for repair 69673' on internal drives? How to fix 'Unable to unmount volume for repair 69673' on external drives? Guide to "Unable to unmount volume for repair. Here, we will help you get your lost files back and fix the "Unable to unmount volume for repair. : (-69673)." As the message implied, the error occurs due to a volume could not be unmounted. However, it sometimes fails its job and shows the error that reads " Unable to unmount volume for repair. Disk Utility First Aid is the common go-to if you need to check and repair an internal or external drive on Mac. ![]()
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