Resize External Hard Drive Partition Mac

Resizing Mac Partition is literally a very important while utilizing Mac hard drive having partition in it. Requirement of Mac Partition With the passing of time, users generally keep adding enormous volume of data to the several partition/volumes of the Mac system. So, in this case it is common the users to finally come in a situation when. Press the Partition button on the top and a new window with a partitions allocation pie chart will appear. You can simply add additional partitions by pressing the plus button and then using section control (2) to adjust its size. So, you will shrink the existing partition and then add the second one.

Managing partitions isn’t nearly as difficult as it may seem—at least not if you use one of the best Mac partition managers described in this article. With their help, you will find it much easier to create extra storage space for your data, format portable devices, or give your partitions more descriptive names without accidentally messing something up and losing important data.

Best Partition Managers: Summary of Our Picks

Evaluation criteriaSoftware
💗 Best overallParagon Hard Disk Manager for Mac
💾 Best for data recoveryDisk Drill Partition Software
💲 Best for freeDisk Utility
📑 Best open sourceGParted (GNOME Partition Editor)
👴 Best for older MacsiPartition for Mac
👬 Best Boot Camp supportStellar Partition Manager

Why You Need Third-Party Mac Partition Software?

Well, you actually may not need a third-party Mac partition manager at all because all recent versions of macOS include a partition manager already: Disk Utility.

The problem with Disk Utility, as we explain in greater detail in this article, is that its functionality is somewhat limited to make it simple enough even for non-techies who don’t know what disk partitions are.

If you’re a more advanced Mac user with at least some previous experience with partitioning, you can gain a lot by installation third-party Mac partition software. Depending on which of the best Mac partition managers listed below you choose, you will be able to:

  • Edit all Windows, Linux, and Mac partitions
  • Recover lost partitions and data
  • Repair various partition issues

Best of all, you don’t even need to spend a lot of money to unlock all these capabilities because free disk partition software is readily available and often just as reliable as paid alternatives.

Top 6 Best Partition Managers for Mac

When selecting applications for this article, we relied heavily on our experience but also took into consideration online reviews published on the web by real users. The result of our research is this list of the top Mac partition software applications.

1. Paragon Hard Disk Manager for Mac​

Expand: Yes Shrink: Yes Delete: Yes Create: Yes Split and merge: Yes Format: Yes Recover: Yes

Supported partitions: APFS, HFS+, NTFS, ext2/3/4, FAT, exFAT

Compatibility: macOS 10.14 Mojave to Mac OS X 10.10 Yosemite

Overview:

Paragon Hard Disk Manager for Mac is a versatile application that combines disk partitioning with data protection and recovery, Boot Camp management, disk cloning, secure data wiping, and more. As such, it can single-handedly help you solve most partition- and data-related issues and keep your Mac in good working order. Unfortunately, Paragon Hard Disk Manager for Mac doesn’t run on macOS Big Sur and Catalina because Apple’s increasingly strict restrictions make it impossible for it to do its job properly.

Key features:

  • Boot Camp resizing: Paragon Hard Disk Manager for Mac can quickly resize Boot Camp volumes by borrowing space from your Mac partition.
  • Data recovery: Recover entire partitions or specific files with a few clicks.
  • Secure file deletion: Completely erase all data stored on your partitions so that your files can’t be recovered using specialized software.
  • Extremely versatile
  • Data recovery capabilities
  • Can undelete lost and accidentally deleted partitions
  • Supports all major file systems
  • Doesn’t support macOS Big Sur and Catalina
  • Free version – 10-day trial
  • Single user license – $39.95
Free Download

2. Disk Drill Partition Software​

Expand: No Shrink: No Delete: No Create: No Split and merge: No Format: No Recover: Yes

Supported partitions: FAT16/FAT32/exFAT, NTFS/NTFS5, HFS/HFS+, APFS, EXT2/EXT3/EXT4

Compatibility: requires Mac OS X 10.11.6+

Overview:

Disk Drill is a popular data recovery application compatible with Mac OS X 10.11.6 and newer. You can use it to recover all commonly used Mac, Windows, and Linux file systems with a single click. Its modern and intuitive graphical user interface with a clean layout makes it suitable even for inexperienced users who are unfamiliar with data and partition recovery. When Disk Drill finds a missing partition, it lets you preview its content, allowing you to select exactly what you want to recover.

Key features:

  • Preview lost files: Disk Drill can preview lost files from missing partitions, allowing you to recover only important files and leave everything else behind.
  • Partition recovery: Disk Drill employs sophisticated algorithms to find and recover partitions that were lost or accidentally deleted.
  • One-click recovery: Thanks to its one-click partition recovery process, you can use Disk Drill to easily recover entire partitions and their content without any special skills.
  • Excellent data recovery performance
  • Can preview all recoverable files for free
  • Can find lost partitions
  • RAW partition recovery capabilities
  • One-click partition recovery process
  • Modern and intuitive graphical user interface
  • Support for all commonly used file systems
  • No partition management capabilities
  • Free version – preview recoverable files
  • Disk Drill PRO – $89.00
  • Disk Drill Enterprise – $499.00
Free Download

3. Disk Utility​​

Expand: Yes Shrink: Yes Delete: Yes Create: Yes Split and merge: No Format: Yes Recover: Yes

Supported partitions: APFS, HFS/HFS+, FAT, exFAT

Compatibility: Disk Utility is included in Mac OS X 10.3 Panther and newer

Overview:

Disk Utility is an easy-to-use partition manager developed by Apple. It’s included in all versions of macOS and Mac OS X from 10.3 Panther up. The app can create, convert, back up, compress, and encrypt logical volume images, verify a disk’s integrity, or check its S.M.A.R.T. status, among other things. Because Apple created Disk Utility with casual users in mind, it doesn’t offer nearly as many partition management features as Paragon Hard Disk Manager for Mac and other similar applications, but the fact that it comes preinstalled on all Mac makes it a great first choice.

Key features:

  • First Aid: Just one click on the First Aid button is often enough to fix common partition issues.
  • S.M.A.R.T. status check: Disk Utility lets you monitor the health of your hard drives to prevent data loss.
  • Easy to use
  • Completely free
  • Can fix partition issues
  • Can’t split and merge partitions
  • Lacks advanced partition management features
  • Disk Utility is completely free and included in macOS

4. GParted (GNOME Partition Editor)​

Expand: Yes Shrink: Yes Delete: Yes Create: Yes Split and merge: Yes Format: Yes Recover: Yes

Supported partitions: BTRFS, EXT2/3/4, FAT16/32, HFS/HFS+, NILFS2, NTFS, REISERFS, UDF, UFS, XFS, and others

Compatibility: Can be used to partition any Mac by booting from media containing GParted Live

Overview:

GParted is an open source partition manager that can be used on any Mac by booting from media containing GParted Live, a live Linux distribution that enables you to use all the features of the latest version of GParted. You would be hard-pressed to find another partition manager with such a comprehensive file system support as GParted. In fact, the application supports so many file systems that we decided against listing them all in this article. Just keep in mind that some file systems can be only moved and copied, while others can also be resized, created, and repaired.

Key features:

  • Bootable from a USB drive or CD: GParted is meant to be accessed from a media containing GParted Live, a small Linux distribution that lets you easily manage your disk partitions.
  • Rescue lost partitions: GParted can repair and rescue certain partition types, helping you regain access to lost data and even entire operating systems.
  • Open source
  • Can be used to partition any Mac
  • Comprehensive file system support
  • Bootable only
  • Outdated user interface
  • GParted is completely free and can be used without any limitations
Free Download

5. Stellar Partition Manager​

Expand: Yes Shrink: Yes Delete: Yes Create: Yes Split and merge: Yes Format: Yes Recover: No

Supported partitions: HFS+, FAT, and NTFS

Compatibility: macOS Sierra 10.12 to Mac OS X Snow Leopard 10.6

Overview:

Stellar Partition Manager is an older partition manager that can create, resize, merge, format, and hide partitions on macOS Sierra 10.12 to Mac OS X Snow Leopard 10.6. You can also find this application distributed as Partition Magic Mac and TechSoftwareLogic Mac Partition Manager. That’s because Stellar Software acquired both Partition Magic Mac and TechSoftwareLogic Mac Partition Manager and decided to leave their original websites up for marketing purposes.

Key features:

  • Hide partitions: If you’re sharing your Mac with other users, it may be useful to hide partitions with important data to prevent data loss and accidental formatting.
  • Create bootable media: Stellar Partition Manager lets you create a bootable drive that you can use to fix a Mac that refuses to boot.
  • Resize Boot Camp partitions: Resizing Boot Camp partitions is easy with this partition manager thanks to its intuitive graphical user interface.
  • Intuitive graphical user interface
  • Ability to create bootable media
  • Boot Camp support
  • Can hide and reveal partitions
  • Doesn’t support the latest versions of macOS
  • Doesn’t support APFS
  • Free demo version available
    Single user license – $39.00
Free Download

6. iPartition for Mac​​

Expand: Yes Shrink: Yes Delete: Yes Create: Yes Split and merge: Yes Format: Yes Recover: No

Supported partitions: HFS+, FAT, and NTFS

Compatibility: macOS High Sierra 10.13 to Mac OS X Panther 10.3

Overview:

iPartition for Mac used to be a popular partition manager for Mac computers, but it, unfortunately, wasn’t able to keep up with Apple’s increasingly draconian security controls. That’s why the latest version of this software works only on macOS High Sierra 10.13 to Mac OS X Panther 10.3, allowing their users to easily create, destroy, resize, and format HFS+, FAT, and NTFS partitions. If you have an old Mac that needs partitioning, iPartition for Mac is a great choice, and there are many other similar apps that work great even on the latest version of macOS.

Resize Mac Os Partition

Key features:

  • Partitioning without reformatting: With iPartition for Mac, you can change the size of a partition that’s currently full of data without losing the data.
  • Support for Boot Camp: Resizing Boot Camp volumes is easy with this partition manager, regardless of if they contain macOS/Mac OS X or Windows.
  • Intelligent partitioning: iPartition for Mac is smart enough to minimize the number of operations it takes to achieve the desired result.
  • Non-destructive partitioning
  • Support for boot camp
  • Completely free
  • Intuitive user interface
  • Doesn’t support newer versions of macOS
  • Doesn’t support APFS
  • iPartition for Mac is completely free
Free Download

So, How to Choose the Right Mac Partition Manager App in 2021?

With so many Mac partition software applications to choose from, even more experienced users can easily become overwhelmed and unable to decide which one to download. Should that ever happen to you, just remember the following selection criteria:

🛠 Features

Since Mac already comes with a fairly capable free disk partition software, called Disk Utility, there’s no point in wasting time on apps that don’t have some extra features. It could be something as simple as support for additional file systems or something as useful as the ability to recover lost partitions and permanently deleted data.

✔ Usability

Some software developers create software for themselves—not other users. While there’s absolutely nothing wrong with that, such software applications are typically not intuitive enough for regular users. That’s bad news because a single mistake when working with Mac partitions can have disastrous consequences.

💁‍️ Customer support

If you decide to spend money on commercial Mac partition software, you better verify that the company responsible for it stands behind its users and provides great customer support. An extensive knowledge base with step-by-step tutorials is a great start, but nothing beats having someone you can contact whenever you find yourself unsure of what to do next.

⚙ Compatibility

Don’t assume that all Mac partition manager apps are compatible with the latest version of macOS. Especially smaller developers can sometimes take months before releasing an update, so take the extra minute it takes to verify that you’ll be able to actually run your app of choice.

Mac

Disk Resize Mac

🔒 Security

Disk management software for Mac is secure when it doesn’t contain any malware, adware, and other nasty surprises. It must also be bug-free to prevent simple partition management operations, such as resizing or renaming, from ending disastrously and causing a massive data loss.

Summary

Each of the top 6 best Mac partition software applications featured in this article brings something unique to the table, so we encourage you to try at least the three best third-party solutions: Paragon Hard Disk Manager for Mac, Disk Drill Partition Software, and Stellar Mac Partition Manager.

FAQ

You can manage partitions on Mac using the free disk partition app that comes included with your operating system, Disk Utility. Alternatively, you can download one of the third-party Mac partition managers described in this article to unlock various advanced features, such as the ability to recover lost partitions and data.
Unless you choose to overwrite the entire storage space, formatting a hard drive shouldn’t take more than a minute. In fact, modern SSDs can usually be formatted in just a few seconds.
On Mac, you can partition any hard drive using Disk Utility. Just remember that Mac and Windows don’t support the same file systems, so make sure to select one that can be read by both operating systems, such as FAT32 or exFAT. Here’s how:
  1. Launch Disk Utility.
  2. Select the hard drive you want to partition.
  3. Click the Partition button in the toolbar.
  4. Click Partition again and use the Add button (+) to create a new partition.
  5. Continue partitioning until you’re done and then click Apply.
By default, modern Macs use the Apple File System (APFS) partition scheme, while older Macs use HFS+, which is also known as Mac OS Extended or HFS Extended.
The best disk partitions software for Mac that you can download at the moment includes:
  1. Paragon Hard Disk Manager for Mac – Best overall
  2. Disk Drill Partition Software – Best for data recovery
  3. Disk Utility – Best for free
  4. GParted (GNOME Partition Editor) – Best open source
  5. Stellar Partition Manager – Best Boot Camp support
  6. iPartition for Mac – Best for older Macs
You can improve your Mac’s performance by choosing a modern partition scheme, such as Apple File System (APFS), but the impact will most likely won’t be noticeable outside of specialized benchmarks. What you will notice is better system stability and less data loss issues.

Disk Utility User Guide

Partitioning a disk divides it into individual sections known as containers.

However, with APFS, you shouldn’t partition your disk in most cases. Instead, create multiple APFS volumes within a single partition. With the flexible space management provided by APFS, you can even install another version of macOS on an APFS volume.

Important: If you’re partitioning your internal physical disk because you want to install Windows, use Boot Camp Assistant instead. Do not use Disk Utility to remove a partition that was created using Boot Camp Assistant. Instead, use Boot Camp Assistant to remove the partition from your Mac.

Add a partition

Important: As a precaution, it’s best to back up your data before creating new partitions on your device.

  1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button in the toolbar.

    If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

    If you have multiple storage devices connected to your Mac, make sure you select a volume that’s on the device you want to partition.

    When you select a volume that already has data on it, the pie chart shows a shaded area representing the amount of data on the volume and an unshaded area representing the amount of free space available for another volume. Disk Utility also shows whether the volume can be removed or resized.

    Note: If you see a small volume with an asterisk, the partition is smaller than can be represented at the correct scale in the chart.

  2. Click the Add button below the pie chart.

  3. Read the information in the dialogue that appears, then click Add Partition.

    Note: If you click Add Volume instead, you can click the Add button to create an additional APFS volume in the container, or click Cancel to return to the Disk Utility window without making any changes to the storage device.

  4. Type a name for the volume in the Name field.

    For MS-DOS (FAT) and ExFAT volumes, the maximum length for the volume name is 11 characters.

  5. Click the Format pop-up menu, then choose a file system format.

  6. Enter the size or drag the resize control to increase or decrease the size of the volume.

  7. Click Apply.

  8. Read the information in the Partition Device dialogue, then click Partition.

  9. If a dialogue appears that indicates it will take a long time to resize the startup volume, read the information in the dialogue, then do one of the following:

    • If you want to proceed with partitioning the disk, click Continue.

    • If you don’t want to proceed with partitioning the disk, click Cancel.

  10. After the operation finishes, click Done.

After you partition a storage device, an icon for each volume appears in both the Disk Utility sidebar and the Finder sidebar.

Delete a partition

Resize External Hard Drive Partition Mac

WARNING: When you delete a partition, all the data on it is erased. Be sure to back up your data before you begin.

  1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button in the toolbar.

    If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

  2. In the Apple File System Space Sharing dialogue, click Partition.

  3. In the pie chart, click the partition you want to delete, then click the Delete button .

    If the Delete button is dimmed, you can’t delete the selected partition.

  4. Click Apply.

  5. Read the information in the Partition Device dialogue, then click Partition.

  6. After the operation finishes, click Done.

Erase a partition

  1. In the Disk Utility app on your Mac, choose View > Show All Devices, then select the container you want to erase in the sidebar.

    If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

  2. Click the Erase button in the toolbar.

    If the Erase button is dimmed, you can’t erase the selected container.

  3. Type a name for the volume in the Name field.

  4. Click the Format pop-up menu, then choose a file system format.

  5. After the operation finishes, click Done.

Enlarge a partition on a storage device

If you have multiple partitions on a device and one of them is running out of space, you may be able to enlarge it without losing any of the files on it.

To enlarge a volume, you must delete the volume that comes after it on the device, then move the end point of the volume you want to enlarge into the freed space. You can’t enlarge the last volume on a device.

Resize External Hard Drive Partition Mac Os

WARNING: When you delete a volume or partition, all the data on it is erased. Be sure to back up your data before you begin.

  1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button .

    If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

  2. In the Apple File System Space Sharing dialogue, click Partition.

  3. In the pie chart, select the partition you want to delete, then click the Delete button .

    If the Delete button is dimmed, you can’t delete the selected partition.

  4. Click Apply.

  5. Read the information in the Partition Device dialogue, then click Partition.

  6. After the operation finishes, click Done.

Resize External Hard Drive Partition Machine

See alsoFile system formats available in Disk Utility on MacAdd, delete or erase APFS volumes in Disk Utility on MacIntro to Disk Utility on MacMan page for diskutil