Erasing your disk: For most reasons to erase, including when reformatting a disk or selling, giving away, or trading in your Mac, you should erase your entire disk.

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Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk.

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Finally, the Mac hard drive icon should now appear on your desktop as shown in the below figure. As you can see how much it is easy to show and hide Mac hard disks or drives on your desktop. Whenever you want quick access to the data on your Mac, all you have to do is to double-click on your Mac HD drive from the desktop and you'll be navigated. The data might still be there, but the 'map' the Mac computer needs to find the data might be lost. Disk Drill enables you to restore the lost partition and get back your data, if it's still there. All mountable devices are supported. Various recovery methods are available based on the file system, even formatted drives are recoverable.

Erasing a disk or volume permanently deletes all of its files. Before continuing, make sure that you have a backup of any files that you want to keep.

How to erase your disk

1. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
   If you're not erasing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
   
2. Choose View > Show All Devices from the menu bar in Disk Utility. The sidebar now shows your disks (devices) and any containers and volumes within them. The disk your Mac started up from is at the top of the list. In this example, Apple SSD is the startup disk:
   
3. Select the disk that you want to erase. Don't see your disk?
4. Click Erase, then complete these items:
   • Name: Type the name that you want the disk to have after you erase it.
   • Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
   • Scheme: Choose GUID Partition Map.
5. Click Erase to begin erasing your disk and every container and volume within it. You might be asked to enter your Apple ID. Forgot your Apple ID?
6. When done, quit Disk Utility.
7. If you want your Mac to be able to start up from the disk you erased, reinstall macOS on the disk.

How to erase a volume on your disk

1. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
   If you're not erasing the volume your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
2. In the sidebar of Disk Utility, select the volume that you want to erase. The volume your Mac started up from is named Macintosh HD, unless you changed its name. Don't see your volume?
3. Click Erase, then complete these items:
   • Name: Type the name that you want the volume to have after you erase it.
   • Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
4. If you see an Erase Volume Group button, the volume you selected is part of a volume group. In that case, you should erase the volume group. Otherwise, click Erase to erase just the selected volume. You might be asked to enter your Apple ID. Forgot your Apple ID?
   
5. When done, quit Disk Utility.
6. If you want your Mac to be able to start up from the volume you erased, reinstall macOS on that volume.

Reasons to erase

You can erase at any time, including in circumstances such as these:

• You want to permanently erase all content from your Mac and restore it to factory settings. This is one of the final steps before selling, giving away, or trading in your Mac.
• You're changing the format of a disk, such as from a PC format (FAT, ExFAT, or NTFS) to a Mac format (APFS or Mac OS Extended).
• You received a message that your disk isn't readable by this computer.
• You're trying to resolve a disk issue that Disk Utility can't repair.
• The macOS installer doesn't see your disk or can't install on it. For example, the installer might say that your disk isn't formatted correctly, isn't using a GUID partition scheme, contains a newer version of the operating system, or can't be used to start up your computer.
• The macOS installer says that you may not install to this volume because it is part of an Apple RAID.

About APFS and Mac OS Extended

Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.

How to choose between APFS and Mac OS Extended

Disk Utility tries to detect the type of storage and show the appropriate format in the Format menu. If it can't, it chooses Mac OS Extended, which works with all versions of macOS. If you want to change the format, answer these questions:

• Are you formatting the disk that came built into your Mac?
  If the built-in disk came APFS-formatted, Disk Utility suggests APFS. Don't change it to Mac OS Extended.
• Are you about to install macOS High Sierra or later for the first time on the disk?
  If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files.
• Are you preparing a Time Machine backup disk or bootable installer?
  Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer.
• Will you be using the disk with another Mac?
  If the other Mac isn't using macOS High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't work with APFS-formatted volumes.

How to identify the format currently in use

If you want to know which format is currently in use, use any of these methods:

• Select the volume in the Disk Utility sidebar, then check the information shown on the right. For more detail, choose File > Get Info from the Disk Utility menu bar.
• Open System Information and select Storage in the sidebar. The File System column on the right shows the format of each volume.
• Select the volume in the Finder, then choose File > Get Info from the menu bar. The Get Info window shows the Format of that volume.

If your disk or volume doesn't appear, or the erase fails

1. Shut down your Mac, then unplug all nonessential devices from your Mac.
2. If you're erasing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
3. If your disk or volume still doesn't appear in Disk Utility, or Disk Utility reports that the erase process failed, your disk or Mac might need service. If you need help, please contact Apple Support.

Learn more

• If you can't start up from macOS Recovery, you can use a different startup disk instead.
• If Disk Utility shows a Security Options button in the Erase window, you can click that button to choose between a faster (but less secure) erase and a slower (but more secure) erase. Some older versions of Disk Utility offer the option to zero all data instead. These secure-erase options aren't offered or needed for solid-state drives (SSDs) and flash storage.

Oct 26, 2020 • Filed to: Solve Mac Problems • Proven solutions

There is no doubt that getting quick access to the Mac HD directory can be quite helpful in many situations. You can easily access several folders, such as System, Users, Applications, and Library. All these folders contain data that any Mac user access on a regular basis. Sadly, macOS High Sierra may not display you the Macintosh HD folder on your desktop or Finder by default. It makes access to files difficult.

The good news is that there are some ways to show the hard drive on Mac. Here, in this post, you will get to learn that, and also, you get to know how to find the external hard drive on Mac.

Part 1. Why You Can't See Hard Drive on Mac?

Well, there are a number of reasons why you can't see the hard drive on your Mac. Here, we are going to mention the most common ones:

• Preference Issue: You may have not set preferences that make the hard drive visible on your Mac Finder or desktop.
• Connector Issue: It might be the case that you fail to connect the hard drive to your Mac USB port correctly. And maybe the cable you're using for connection is damaged or non-functional.
• Corruption of File system: It might also case that the file system of the hard drive is corrupt due to bad sectors, logical errors, etc. Sometimes, your hard drive file system damage leads to non-mounting HD in Finder.
• Hard drive failure: It might be the case that your drive is physically damaged due to component failure, head crash, or etc.

Part 2. How to Show Hard Drive Icon on Mac Desktop?

It is the Finder's job for displaying the desktop and its icons, which include storage devices icon too. You can show or hide Mac's main hard drive from the desktop of your Mac with ease and all you need to do is to adjust some of the Finder options. If you want to keep your hard drives icon on the desktop so that you can access the data easily, then here's what you have to do to show HD on Mac.

To begin with, you need to first have the Finder option in the foreground. For this, check if there is the word 'Finder' in your Mac menu bar. If no, then all you have to do is to tap on the 'Finder' icon from the Dock of your Mac to appear it in the foreground.

Once you are able to do it, follow the below steps to show the hard drive on a Mac desktop:

1. Go to the Menu bar, and then, move to 'Finder'. Next, click on the 'Preferences' option.
2. Next, select the 'General' tab when the Finder preferences window appears on your Mac screen.
3. After that, check the box 'Hard disks' under 'Show these items on the desktop'.
4. Finally, the Mac hard drive icon should now appear on your desktop as shown in the below figure.

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As you can see how much it is easy to show and hide Mac hard disks or drives on your desktop. Whenever you want quick access to the data on your Mac, all you have to do is double-click on your Mac HD drive from the desktop and you'll be navigated to the place where all of your Mac data is stored.

Part 3. How to Find External Hard Drive on Mac?

Is your Mac not detecting the external hard drive? In many cases, an external hard drive doesn't show up on your Mac. There is no doubt that it is quite frustrating, especially when you want to transfer something very important right then. Besides this, there can be a change that data present on an external hard drive is corrupt, which is one of the reasons why your Mac can't detect an external drive.

The good news is that there are some solutions that can help you to come out of this problem with ease. Let's look at them:

1. Mount the External Hard Drive on Mac

It could be the case that your Mac already detects an external hard drive, but it just not showing its icon on your desktop screen. If it is the case, then you can easily mount and access your drive again and all you have to do is to follow the below steps:

1. To start with, move to the Finder menu and here, choose Preferences.
2. In the Finder preferences window, choose the General tab.
3. Here, you need to make sure that the 'External disks' option under 'Show these items on the desktop' is ticked.

Also, you can set your Mac to display an external hard drive in Finder. For this, go to 'Finder'>' Preferences'>' Sidebar'. Here, you need to tick the option 'External disks' under the 'Locations' menu.

This method will probably help you to show the connected external hard drive on your Mac. If it doesn't, then you can go for the next solution. And if you need to make a USB flash drive detected, the solutions might be more feasible: Fix USB not showing up on Mac.

2. Launch Disk Utility to Run First Aid

There might be a case that your external hard drive is going through some problems you are unaware of it. In this case, you can try to resolve them yourself using Disk Utility to run the First Aid tool. Afterward, you can even access your files. The tool will inspect the disk for issues and errors and then, try to repair it as required. It is quite helpful when it comes to verifying and repairing a wide range of problems related to external and HD drive.

Here is the step-by-step guide on how you can run First Aid on your external hard drive:

1. To start with, launch Disk Utility. You can search for it using Spotlight Search or go to 'Finder'>' Application'>' Utility'
2. After that, you need to check on an external hard drive. Next, click on the 'First Aid' tab and choose 'Run' to begin running diagnostics.

If First Aid tools become successful in fixing problems, then your external hard drive should now be available for you to mount. What if the tool fails to repair issues? Then, your drive is badly broken or maybe formatted through a file system that your Mac can't read. In this way, we recommended that you should recover data from the damaged hard drive. Check out the next section to learn how to get back and how hard disk data on Mac.

Part 4. How to Recover and Show Hard Drive Data on Mac?

Have you ever wondered what if you found that you can't access the data stored on your Mac hard drive due to sudden power failure, or virus attack? Or if the above methods fail to fix 'external hard drive not mounting Mac'. In such cases, data recovery software can help you to easily get back hard drive data on your Mac.

1. Recoverit - The Best Software to Recover Mac Files:

Whenever you experience a data loss situation, Recoverit Data Recovery Mac will help you to retrieve it. This data recovery software will come in handy even when you've never made a backup of your device. You now know how to partition Mac hard drive and un-partition it. But knowing how you can recover the lost or deleted files from the drive is also necessary.

2. How to Recover Lost Word Files on Mac:

Step 1: Select a Location

Launch the software and select the drive from where the data files are lost. If you don't know which drive to search, tap on the 'I can't find my partition' option, and hit the Start button.

Step 2: Scan the Location

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Typically, the software will run an All-Around Recovery scan and search for the lost and deleted files on the entire drive.

Step 3: Preview and Recover

When the scan completes, the files will be listed on the screen. The software will sort out the files according to format to make the search easier. You can select multiple files at a time and have a preview of them.

Conclusion

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It can be concluded that creating and removing a Mac drive partition is not that tough. You just have to careful during the process. And in case of a mishap, Recoverit is always here for your help so that you don't have to suffer from data loss situation.

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