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1. Volume could not be unmounted using disk utility install#
2. Volume could not be unmounted using disk utility drivers#

Volume could not be unmounted using disk utility drivers#

A new feature in Big Sur is that if obsolete third party extensions are detected, or extensions that are not optimized for Big Sur, then some or all third party drivers will be prevented from loading. When installing SoftRAID in Big Sur, macOS never prompts the user to go to System Preferences and the “Allow” option is not available.īig Sur has strict requirements for drivers to load.

If you skip this step, your SoftRAID volume will be unable to mount. If you forget to do this, after startup, open System Preferences -> Security, unlock the pane and click “Allow” to enable the SoftRAID driver to load. macOS will display a dialog box, pointing the user to System Preferences/Security when the SoftRAID driver is installed.

Volume could not be unmounted using disk utility install#

When you install the SoftRAID driver, the driver cannot load until OWC is allowed as an identified developer. Installing the driver requires going to System Preferences -> Security to “Allow” OWC as an identified developer. Select the “Allow user management of kernel extensions from identified developers” checkbox to allow installation of software that uses legacy kernel extensions. Select “Reduced Security” and enable this: Third party drivers must be enabled for any drivers, not just SoftRAID. Third Party Driver loading in M1 computers requires allowing third party drivers to load.īefore the SoftRAID driver can load, please follow these instructions from Apple.