Since Disk Utility can no longer access the hidden Recovery HD partition, we have to use a different method, specifically, Terminal and the command line version of Disk Utility, diskutil. Our first step is to create a disk image of the hidden Recovery HD. The disk image does two things for us; it creates a copy of the hidden Recovery HD volume, and it makes it visible, easily accessible from Mac's desktop. We need to find the disk identifier for the hidden Recovery HD partition.
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Enter the following at the Terminal prompt:. Terminal will display a list of all partitions your Mac is able to access, including those that are hidden. The line with the Recovery HD item will also have a field labeled Identifier.
How do I create a Recovery HD volume on my backup disk?
Here you'll find the actual name used by the system to access the partition. It will likely read something like:. The identifier for your Recovery HD partition may be different, but it will include the word "disk", a number, the letter "s", and another number.
Once you know the identifier for the Recovery HD, we can proceed to make the visible disk image. The next step is to partition the drive that you wish to have the Recovery HD volume created on. However, since the size can change with each new version of the operating system, we suggest making the partition size larger than 1.
The next-to-last step is to clone the Recovery HD disk image to the partition you just created.
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You can do this in the Disk Utility app using the Restore command. If you remember back to when we started this process, we asked you to use Terminal's "diskutil" to find the Recovery HD volume. So, our last task is to set the Type. This will also cause the Recovery HD volume to become hidden. We need to discover the disk identifier for the Recovery HD volume you just created. Because this volume is currently mounted on your Mac, we can use Disk Utility to find the identifier.
Share Pin Email. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc. Enable Disk Utility's Debug Menu. Once you have the destination drive partitioned, we can proceed.
From the Debug menu, select Show Every Partition. Drag the Recovery HD volume to the Source field. Drag the volume you want to use for the new Recovery HD to the Destination field. Double-check to be sure that you're copying the correct volume to the destination because any volume you drag there will be completely erased by the cloning process.
When you're sure that everything is correct, click the Restore button. Disk Utility will ask if you really want to erase the destination drive. Click Erase. You will need to supply an administrator account password. Enter the requested information, and click OK. The cloning process will begin. Disk Utility will provide a status bar to keep you up to date on the process.
Once Disk Utility completes the cloning process, you're ready to use the new Recovery HD but with any luck, you'll never need to use it.
A Few Additional Notes. At the top of the Disk Utility window, click the Unmount button. Hit Enter or Return. This can result in the error message "Only one image can be created at a time. Terminal will ask for your administrator password. Enter your password, and hit Enter or Return. Once the Terminal prompt returns, the Recovery HD disk image will have been created on your Mac's desktop.
Once you have partitioned the selected drive, you can continue from here. Launch Disk Utility , if it isn't already open.
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In the Disk Utility window, select the partition you just created. It should be listed in the sidebar. Get help. PC All Mac Windows. Things to know about the new Mac Mini. What is Stacks in macOS Mojave and how to enable it? What is new in Apple Watch Series 4? Top 10 Smartphones under in India. All Blogger Hosting WordPress. Trendy Apps of What are the new apps introduced with iOS 12?
Latest Microsoft and Windows related Updates and News PC Mac. To reset the Mac administrator password. To restore from Time Machine Backup. To run repair and maintenance task for the internal hard drive. To Reinstall OS X. To set or remove firmware password.
To get help Online using Safari from recovery partition in case of no boot issue. To recover your data in case of crash or system failure. Select the USB drive on the left that shows the capacity and not the Volume which appears indented below the drive. Confirm the warning message for data lose.
Click on the partition button from the top menu bar and add the partition just in case you want to create a 2 GB partition for Recovery HD. One the partition is created and the disk is formatted, it can be used in creating recovery USB drive. Follow the next step.
Open Recovery Disk Assistant and accept the license agreement. Select the USB drive, you want to create recovery system on. The utility clone the Recovery system on external USB drive, verify it and make it hidden as a boot partition. Once finished eject the USB drive and keep it safe for future use.
You can also watch this YouTube video for the whole process. You will have to use the terminal commands as mentioned in Option 3 in order to clone the recovery partition on an external USB drive. This method needs you to run some terminal commands. Be careful while entering the command as it may cause severe damage to your computer or files if executed incorrectly.
The idea behind this method is same as option 2 but here we will use terminal commands to copy the Recovery HD to an external USB drive. Above command will create a copy of the internal Recovery HD volume on desktop. Now open the disk utility, go to restore tab and follow all the same steps as mentioned in Step-5 through Step-9 in option 2 above.