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Bootable Hard Drive Not Showing Up Mac

Jul 23, 2015 remove your external drive and all other USB devices except keyboard and mouse. If your system does not boot you may try to repair the drive using Single User Mode. Mac OS X: How to start up in single-user or verbose mode - Apple Support. Reboot holding down CMD+S. At the hashtag prompt (#) type.

Sep 30, 2008 It would have to be seen by the system, install disc, or disk utility in order it to be installed. If the drive is not formatted at all, it would be usually be formatted first. But if there is an unformatted disk, the installer should be able to suggest you that it is unformatted. Reinstall macOS. Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions. Follow these guidelines during installation: If the installer asks to unlock your disk, enter the password you use to log in to your Mac. If the installer doesn't see your disk, or it says that it can't.

Sep 08, 2021 • Filed to: Solve Mac Problems • Proven solutions

Recovery HD is a hard drive partition on the hard drive of Mac. It can be accessed by rebooting the Mac and then pressing down the Command+R keys. Mac OS X Lion and above include the Recovery feature which can be used to reinstall the operating system, repair the hard disk or restore the system from a backup. To enter the recovery mode, press command+r key when the system reboots, keep holding them down until the Apple logo appears. The recovery mode has a desktop with an OS X menu bar and an OS X Utilities window with the options listed above. You can then choose your desired option from the utility window or the utility menu depending upon your requirement. Here we outlined the useful function of recovery HD and how to restore Mac with the help of recovery HD. What's more, when users could not fix issues with recovery HD, there is still a way to recover data on Mac.

Part 1: What recovery hd could help you to do

As mentioned earlier, Recovery HD contains essential diagnostic and troubleshooting tools that help users fixing his Mac if anything goes wrong. The Recovery HD has the following features:

1. Restore Mac from Time Machine

Time Machine has a unique backup feature in OS X. Time Machine keeps a track of how your Mac performed on a particular day so that users can restore Mac to any desired day in the past. Time Machine keeps backup of a day, a week, and even a month but when the backup drive becomes full, the oldest backup will be deleted to make more space for the new backups.

2. Repair Hard drive

Disk utility is one of the main options offered in the recovery mode. This feature can be used to repair the hard drive of your Mac once you select the 'Repair Disk' option. recovery HD will also let you search for troubleshooting info over the internet as well as remove the contents of the hard drive and restore it from a Time Machine back up.

3. Install/uninstall Mac OS X

This is also a great feature provided by the Recovery HD. Using this feature you can download your desired version of the OS X over the internet without requiring any kinds of the optical disk. But, for this method to work, you need to be connected to the internet.

Part 2: How to Restore Mac with the help of Recovery HD

To restore Mac with the help of Recovery HD, follow these steps:

To get access to the Recovery HD volume, restart your Mac while pressing the Command and R keys until the Apple logo appears.

You will see only a very basic OS X interface with the OS X utility window. Select Disk Utility from this window and hit 'Continue'.

From the Disk Utility window, select the First Aid tab and then click the icon of your boot hard drive. If your boot hard drive is Recovery, for instance, click on the hard drive marked Recovery and select 'Repair Disk'.

It will take a little time for your Mac to get all the diagnostic and troubleshooting procedures going but after a while, you will notice the appearance of a window telling you that the drive has been repaired.

Quit Disk Utility by choosing Disk Utility→Quit Disk Utility, by pressing Command+Q, or by clicking the red Close Window gumdrop then reboot the system and return to your work.

Related: Further, read and know more methods on restoring Mac.

Part3: How to Troubleshoot Recovery HD Problems

Recovery HD aims to help users get the solutions from different troubleshooting by OS X. But what happened if you cannot find any solutions from the Recovery HD itself? Well, one thing that you shouldn't do is panicking. This article takes into account some common problems with recovery HD itself and tells you how to take care of them in the following lines.


1. Recovery HD is Locked

Recovery HD can get locked sometimes which is indicated by the appearance of an error message that says, 'Hard Drive locked'. To get rid of this problem, simply go to disk utility, click on the hard drive then click 'enable journaling' to unlock the drive.

2. Recovery HD doesn`t Show up

Recovery HD does not show up if you have formatted your entire hard drive. To bring it back, you will need to have a Time Machine backup of the data from your hard drive before the formatting happened. Restoring the OS from that backup will get you your OS back while to get the Recovery HD back you will need to run a minimal install of your OS using a setup from the internet or a disk. It will bring back the recovery HD to your Mac.

Install Mac Os X Hard Drive Not Showing Up In My Computer

We recommend a Mac hard drive recovery software for you, once you did not backup data from the hard drive before you restore Max os or you can not restore Mac with the help of recovery HD. Recoverit data recovery for Mac, it can help you recover lost or deleted files from Mac quickly, safely, and thoroughly. It supports to recover lost, deleted, formatted data from Mac hard drive as well as from USB drives, external hard drives, and other storage devices.

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Active1 year, 3 months ago

I created a Yosemite boot USB, from the App Store version 10.10.1.

When I hold option during Boot, the USB drive doesn't show up on the menu.

I have an aluminium MBP, bought in 2009. It is the full body aluminium with the Superdrive.

Per Apple, this is my machine:

The only drives I see when holding down option are Macintosh HD and Recovery. When I try to run recovery, it runs for a little and then goes to a 'no' symbol, with the spinner still spinning. I am concerned that the HD may be dead/dying, but I don't want to jump to that conclusion yet.

How do I either boot to my USB, or just get a restore done?

I have already successfully backed up my files. I just want to restore the machine.

Edit 1

I made the USB Boot drive from this guide:

Specifically choice number 1, where I downloaded the OS from the App Store and ran the terminal commands on a pre-formatted USB drive.

Edit 2

Below you will see the Disk Utility for the USB drive. Not sure how to tell if it is a Boot disk or not.

Edit 3

The below screenshot shows EFI in Debug mode in Disk Utility.

For what it's worth, when I plug in this drive into my working MBP, I see the 'Install OS X Yosemite' get mounted in Finder.

Edit 4

Here is a screenshot of the 'Startup Disk' option within 'System Preferences' on my working MBP that has the Bootable USB plugged in - which proves that it was properly created, I believe. You can check the screenshot to confirm though.

Edit 5

Output from bless --info... command:

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You might try resetting the pram on your mac.I understand that startup disk settings are stored there.

If the disk is bootable on other Macs, it stands to reason that it should boot on this one.

You can reset the pram by doing the following:

  1. Shut down the Mac.
  2. Locate the following four keys: option,command, p and r. You'll need them in the next step.
  3. Power on the Mac, then immediately hold option, command, p and r.You need to do this before the grey screen appears.
  4. Hold down the keys until you hear the startup sound twice, then release them.
  5. Plug in the bootable USB stick, restart the Mac, and hold option.

I can't guarantee that it'll work, but it won't hurt, so it's worth a try.


I just ran into this as well. When booting from a USB disk that seemed to be bootable, it would display a 'no' symbol ( e.g. ⃠ ...) after trying to boot into it and would then boot into the OS. I tried wulfderay's suggestion (the currently voted answer) to reset the pram and it didn't help.

I came across this installation tutorial and figured out that #5 in Step 1 of creating the drive had been wrong in my case. It's important to create the partition as 'GUID Partition Table' rather than either of the other two. Mine was previously 'Master Boot Record' as a partition scheme.

Bootable Hard Drive Not Showing Up Mac Computer

I'm guessing this could be the edge case that a few of us have run into. I confirmed the SHA of my Yosemite download and used the same one to re-create the bootable USB, so this was the only difference.


Something similar has occurred to me before but then I identified that the .dmg of the OS X file was damaged which made the created bootable USB useless. Please make sure you check the SHA1 hash of the downloaded dmg with someone else to rule this possibility out.

Jash JacobJash Jacob
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Only thing that worked for me was to create the same Yosemite boot disk on a firewire drive.

MacPro Desktop Tower: OS X v10.9.5; 2x3.2GHz Quad Core Intel Xeon, 14GM 800 MHz DDR2, MacPro3,1.

David C.David C.

After booting with the Option method, plug in the USB drive after the existing disks appear. I think this relates to protecting the system from USB viruses: you're normally only allowed to connect the drive after the system is powered-on... this is my logic anyway!

Bootable Hard Drive Not Showing Up Mac Download

Danny VanderbylDanny Vanderbyl

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