Can T Partition Usb Drive Mac

This will show all the drives on your PC. Locate your USB drive by looking at the size of the disk. In the picture below, we can see that Disk 4 size is 14GB. This is the USB drive that we want to format. Type select disk N, where N is the disk number of your USB drive and press Enter. In our case, we type select disk 4. This will select. Format your USB drive as “Mac OS Extended (Journaled)” and choose the GUID Partition Map scheme. If you can’t find the option to set the partition table, make sure you’re selecting the “View - Show All Devices” option. Right-click on the USB drive, click Erase. I do not need the data on the HDD. It can be wiped clean before.

These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

Partition disk3. Create 2 partitions. Partition type is MBR. 1st partition is MS-DOS, named DOSEXC, and 20G in size. 2nd partition is ExFAT, named Exexchange, and uses Remaining space. Warning, no confirmation, no undo! You can get a list of all disks with this command.

1 Rules of Resizing Partition for Mac. If you want to resize a partition for your Mac without erasing data, there are some rules you need to follow. Ensure you pay attention to these rules for maximum results. The last partition on a drive cannot be increased. However, it can be deleted. Jun 11, 2015 Macbook pro, iMac, macbook air, macbook, macbook retina display, macbook retina display 2, mac pro, iMac retina 5k display, mac mini,apple laptop. Apr 28, 2016 Erase and format Mac OS Extended first, then into Partition and under Options select GUID format, and then partition. Using OS X.7 or later make a bootable USB thumb drive before running Installer! Quick Navigation Switcher Hangout Top. Which is appropriate for a flash drive? I know the first one (GUID Partition Map) is for booting modern Macs. Booting is not an issue for my use of this flash drive. The second one (Master Boot Record) is old, from the 80's DOS 2, for old PCs. Why is this offered as a scheme for 'Mac OS Extended (Journaled)'?

Download macOS

Find the appropriate download link in the upgrade instructions for each macOS version:

macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.

OS X El Capitan
El Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

Mac Os X Partition Utility

  1. Connect the USB flash drive or other volume that you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended.
  2. Open Terminal, which is in the Utilities folder of your Applications folder.
  3. Type or paste one of the following commands in Terminal. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.

    High Sierra:*
    El Capitan:
  4. Press Return after typing the command.
  5. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
  6. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created.
  7. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. You can now quit Terminal and eject the volume.

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument, similar to the way this argument is used in the command for El Capitan.

Use the bootable installer

After creating the bootable installer, follow these steps to use it:

  1. Plug the bootable installer into a compatible Mac.
  2. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery.
    Learn about selecting a startup disk, including what to do if your Mac doesn't start up from it.
  3. Choose your language, if prompted.
  4. A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar.
  5. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

Learn more

For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:


Mac Os Partition Disappeared


High Sierra:


El Capitan:

Can't Partition Usb Drive Mac Sierra


For Apple Mac users, there are two ways to format USB flash drive to FAT32, including Disk Utility and Terminal command line. Refer to detailed steps of using both tools for FAT32 format. Formatting would erase data completely, make sure that you have a data backup. Otherwise, you can only use data recovery software to recover data from a formatted USB drive.

Are you looking for a secure way to format USB flash drive to FAT32 on Mac? You are at the right place. Follow here, you will find two methods that will assist you in doing so on your storage device and if you lost data due formatting, reliable Mac file recovery software is ready to help anytime:

Workable SolutionsStep-by-step Troubleshooting
Method 1. Use Disk UtilityConnect USB to Mac > Go to Applications > Utilities > Disk Utility > Select USB and click 'Erase'...Full steps
Method 2. Use Terminal CommandConnect USB to Mac > Hit cmd + space keys > Type terminal and hit Enter...Full steps
Bonus Tip. Recover Formatted DataIf you lost data due to formatting, run EaseUS file recovery software > Scan and recover formatted data...Full steps

How to Format a USB Flash Drive with Mac to FAT32

Many computer users who use a removable flash drive have the demand for formatting it to the FAT32 file system. Compare with the other commonly used NTFS file system on a flash drive, FAT32 has a compatibility advantage across many operating systems.

It's a universal format that is compatible with Mac OS X/macOS, Windows, Linux and DOS systems. So, if users anticipate using the flash drive with more than one operating system, they will definitely benefit from the FAT32 file system. For Apple Mac users, there are two ways to format a USB flash drive to FAT32, including Disk Utility and Terminal command line. Refer to detailed steps of using both tools for FAT32 format.

Method 1. Format FAT32 on Mac [Disk Utility]

To format USB to FAT32 with Disk Utility will erase all data on the flash drive, so before you doing so, please do remember to check whether you have saved useful data to another secure device in advance.

To format the USB drive to FAT32, follow the next steps:

Step 1. Connect the USB flash drive to your Mac computer.

Can T Partition Usb Drive Mac Download

Step 2.Go to Applications > Utilities > Double click and open Disk Utility.

Step 3. Select your USB flash drive on the sidebar, choose Erase.

Step 4. Rename the USB flash drive, choose the format as MS-DOS (FAT) for Format, Master Boot Record for Scheme. Then click Erase.

Wait for the process to complete, then you’ll get an empty new USB flash drive with FAT32 as the file system. You can reuse it for saving data again.

Method 2. Format FAT32 on Mac [Terminal Command Line]

The command line behavior does the same way to erase data with the Disk Utility. Again, create a backup before taking this action.

To format FAT32 with Terminal, follow the next steps:

Step 1. Connect your USB flash drive to your Mac computer.

Step 2. Hit cmd + space to run Spotlight, type: terminal and hit Enter.

3. Type:diskutil list and find out which disk is your USB drive. (In the below picture, you can see that /dev/disk2 is the USB drive)

4. Type: sudo diskutil eraseDisk FAT32 MBRFormat /dev/disk2.

  • sudo gives you user right.
  • Diskutil calls disk utility program.
  • eraseDisk commands to format.
  • FAT32 sets the file system.
  • MBRFormat tells disk utility to format with a Master Boot Record.
  • /dev/disk2 is the location of the USB drive.

Wait for the process to complete. After this, you can type: diskutil list in command again to check if the formatting has been successful.

Complementary Data Recovery Tip

Formatting would erase data completely, make sure that you have a data backup. Otherwise, you can only use data recovery software to recover data from a formatted USB drive.

Partition Os Drive

EaseUS Data Recovery Wizard has both Windows and Mac versions, so it's the optimal choice for data recovery, no matter you're using a PC or Mac. If you're a Mac user, for example, it takes only a few clicks for the software to scan and display your formatted data. To guarantee an effective data recovery without spending money to no avail, you can install the Mac data recovery free version for the first trial. You can preview all the found data before the final recovery.

To recover data from a formatted FAT32 USB flash drive on Mac, follow the next steps:

Step 1. Correctly connect your USB flash drive to your Mac. Launch EaseUS Data Recovery Wizard for Mac. Start selecting the flash drive and click Scan to let the software search lost files on it.

Step 2. After quick scan and deep scan, all files will be presented in the left pane in the scan results.

Partition Flash Drive Mac Os

Step 3. Select files you want to recover and click Recover Now button. Don't save the recoverable files to the USB drive itself in case of data overwriting.

Partitioning a disk on a Mac is an effective way to organize your data into different categories. However, the main concern is that most external hard drives and USB keys come formatted for Windows, which is primarily for PCs. By default, a Mac runs a different file system, so it may bring issues while partitioning your disk on Disk Utility.

Hard drive partitioning is a common issue discussed in many tech forums. In a thread on Apple’s support forum, users complain that their Mac Disk Utility partition grayed-out while trying to partition their external hard drives.

Probably, you just bought your external hard drive and are eager to use it on your Mac. But somehow, you cannot access the Mac Disk Utility partition, so you can’t write data to the drive.

Fear not, we have a solution to this problem. In this post, we will guide you through a step-by-step process on how to restore a grayed-out Disk Utility partition. Many Apple users who have faced Partition grayed out in Mac issues eventually partitioned their external hard drives with the help of these fixes.

Pro Tip: Scan your Mac for performance issues, junk files, harmful apps, and security threats
that can cause system issues or slow performance.

Free Scan for Mac Issues

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Why Partition Grayed Out in Mac (Plus Solution)

Problem 1: Sometimes, you cannot access the Mac Disk Utility partition because your hard drive doesn’t have sufficient space.

Solution: If you want to go ahead with the partitioning task, you need to create more space on your hard drive. In other words, you have to erase the data on your drive to create additional space. You can then format your hard drive using GUID Partition Table. After that, go ahead with your partitioning plans.

Can T Partition Usb Drive Mac Os

Important Note: Before formatting your hard drive, back up your most important files. Needless to say, the process will get rid of all the data on the disk, so you risk losing your files for good.

Problem 2: As mentioned earlier, external drives are usually not compatible with macOS, which may bring issues when you want to partition. In most cases, users choose the wrong partitioning option, and as a result, the Partition option in Disk Utility remains grayed out.

Solution: The right way you should follow when selecting a partition option is to choose the drive name within the list provided under Internal or External (depending on the device you want to partition). Your hard drive will be available on the left side of the Disk Utility pane.

How to Restore Grayed Out Disk Utility Partition: Format Your Hard Drive to Work with Mac

To format your external disk to be compatible with macOS, connect your hard drive to the Mac and follow these steps:

  1. Open Disk Utility by going to Applications, then select Utilities > Disk Utility.
  2. Choose the drive name within the list provided under ‘External’. If your hard drive is connected, it will show in the left panel of the Disk Utility. Highlight the disk and click the Erase button in the top toolbar.
  3. Wait for a window asking you to select the file system you want to use to format your external drive to pop up. For your case, you will select ‘Mac OS Extended (Journaled)’. But if you have plans to use your disk for both PC and Mac, then a better option is ‘ExFAT’. You can also rename your hard disk here to your desired name.
  4. Wait for the formatting process to complete. The process usually takes less than a minute, but it depends on the size of your hard disk.
  5. When done, confirm if the formatting was successful by right-clicking the icon for your disk on the desktop and then choosing Get Info. The information is available under Format.

If it reads “Mac OS Extended (Journaled)”, congratulations, you successfully restored the grayed-out Disk Utility and your hard disk is now compatible with macOS.


Partitioning Your Hard Drive on Mac

Now that you have prepared your hard drive to work with Mac, the next step is to partition it on your Mac by following these steps:

  1. Launch the Disk Utility app on your Mac and highlight the hard drive icon under ‘External’ (for external hard drives). If you choose any other drive, the partition option will become unclickable.
  2. Now click Partition on the top toolbar. A window that has partition information will pop up. On the left side of the window, look for the name and the volume size of your hard drive. The next step is to click add(+) button on the bottom of the window to create partitions on your disk. Allocate the desired volume size to each partition.
  3. Hit the Apply button and wait for a window asking you to verify your choices. Confirm the changes by clicking the Partition button.
  4. Wait for the process to complete. You can confirm if the process was successful on your desktop. You will see additional disk icons show

Pro Tip: If the main reason for partitioning your hard drive is to install Windows, Apple recommends that you use Boot Camp Assistant instead of Disk Utility. You should, however, note that you cannot use Disk Utility to erase a partition generated using Boot Camp Assistant.

What Else Can You Do to Resolve Common Mac Issues

If you are like many users, partitioning a hard drive on Mac may not be the only challenge you have had with your computer. Mac users have also reported slow performance, random freezes, and space issues. The best way to guarantee the best performance for your Mac is to scan and clean the computer. Mac repair app helps you to optimize your Mac for peak performance by checking for and cleaning up junk files, unnecessary apps, and other space hogs that may affect your Mac’s memory.

We hope the above solutions helped you to restore the grayed-out Disk Utility partition. As always, we would love to hear your success story. Share it in the comment section. Also, let us know if you experienced challenges during the partitioning process.