Click on the drive you’d like to erase (not any of its indented partitions) and then click the Erase button in the toolbar. In Disk Utility, you should see a list of both your internal and external disks in the sidebar on the left. After the installation process completes, your iMac will automatically reboot into OS X Mountain Lion. Once it powers up and mounts in Finder, launch Disk Utility (found in the Applications > Utilities folder). (The 'Erase.' button is greyed-out.) In this window, the 'Writability' section says 'Non Recordable', even though both the drive. From the Easy CD Creator menu: Disc - Disc Information - then click on the RW drive.
Disk utility won t let me erase password#
For example, choose the hard drive you want to reinstall the operating system on and enter your Apple ID and password when prompted. From the Easy CD Creator menu: Disc - Erase Disc. The OS X Utilities window re-appears.Ĭhoose "Reinstall OS X" and click "Continue." Follow the directions to reinstall OS X Mountain Lion. Open the "Disk Utility" menu and choose "Quit Disk Utility" after the system displays the message that the disk has been successfully erased. The time for the process to complete depends on the amount of data on the disk. Click the "Erase" tab.Ĭlick the "Format" pop-up list and select "Mac OS Extended (Journaled)." Enter a name for the hard drive in the Name box and click "Erase." The system automatically erases the disk. If you only have one hard drive, it will be the only disk available.
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If the system does not automatically connect to the Internet, select your wireless network from the Wi-Fi menu to establish a connection.Ĭhoose "Disk Utility" from the list of options to open the Disk Utility window and click "Continue."Ĭhoose the hard drive you want to clear.
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Release the keys after the OS X Utilities window opens. Press the "R" and "Command" keys simultaneously and hold them when the system restarts.