- Download and install iMac Hard Drive Firmware Update 1.0 using Software Update. This will install an updater application in the Utilities folder; if the update doesn't run automatically, double-click the updater application in the Utilities folder.
- Follow the onscreen instructions to install the firmware update. Important: do not interrupt power to the computer while the updater is running.
- When the computer restarts, the update should be installed successfully.
If this issue occurs after installing the update on your iMac (Mid 2010) and Disk Utility continues to report that the volume cannot be repaired, the hard drive may need service.
If you cannot start up the computer normally to install this update, you can temporarily use an external hard disk drive (with the version of Mac OS X that came with iMac (Mid 2010) installed on it) and run Software Update.