How to hfs+ format mac

What is HFS+?

HFS+ (Hierarchical File System Plus), also known as Mac OS Extended, is a file system developed by Apple Inc. for its macOS operating system. It was introduced in 1998 with Mac OS 8.1, replacing the older HFS file system. HFS+ was the primary file system for macOS until it was superseded by APFS (Apple File System) starting with macOS High Sierra in 2017. However, HFS+ remains compatible with modern macOS versions and is still widely used, especially for external hard drives, older Macs, and Time Machine backups (prior to macOS Big Sur).

Why Would You Format a Drive to HFS+?

While APFS is the default for new Macs, there are several reasons why you might still need or want to format a drive to HFS+:

• Compatibility with Older Macs: If you need to share data with or use a drive on a Mac running an older operating system that doesn't support APFS, HFS+ is essential.
• Time Machine Backups: Older versions of Time Machine used HFS+ for backups. While newer macOS versions default to APFS for Time Machine, some users may still prefer or need HFS+ for compatibility with older backup drives.
• External Drives for Mixed Use: If you use an external drive with both Mac and Windows computers, formatting to exFAT might be a better choice for read/write compatibility. However, if the drive is primarily for Mac use but needs to be accessible by an older Mac, HFS+ is the way to go.
• Specific Software Requirements: Certain older applications or workflows might have been designed with HFS+ in mind and may not function optimally with APFS.
• Simplicity: For users who don't need the advanced features of APFS (like snapshots and space sharing), HFS+ offers a simpler and well-understood file system.

How to Format a Drive to HFS+ Using Disk Utility

Formatting a drive will erase all existing data on it. Therefore, it is crucial to back up any important files before proceeding.

Step 1: Connect the Drive

Connect the external drive or identify the internal drive you wish to format to your Mac.

Step 2: Open Disk Utility

You can find Disk Utility in several ways:

• Go to Finder > Applications > Utilities > Disk Utility.
• Use Spotlight Search (Cmd + Spacebar) and type 'Disk Utility', then press Enter.

Step 3: Select the Drive

In the Disk Utility window, look at the sidebar on the left. You will see a list of drives. It's important to select the correct drive. You'll usually see your internal drive(s) listed under 'Internal' and external drives under 'External'. Select the specific drive or volume you want to format. It's generally recommended to select the parent drive (the top-level entry for the physical disk) rather than a volume indented beneath it, especially if you want to repartition the entire drive.

Step 4: Click 'Erase'

With the desired drive selected, click the 'Erase' button located in the toolbar at the top of the Disk Utility window.

Step 5: Choose Formatting Options

A dialog box will appear with several options:

• Name: Enter a name for your newly formatted drive (e.g., 'My Backup Drive', 'Old Mac Drive').
• Format: This is the crucial step. Click the dropdown menu and choose one of the HFS+ options:
  • Mac OS Extended (Journaled): This is the most common and recommended HFS+ format for general use on Macs. The journaling feature helps protect the file system's integrity against data corruption from unexpected shutdowns or crashes.
  • Mac OS Extended (Case-sensitive, Journaled): Use this option only if you specifically need case sensitivity in file names (e.g., 'MyFile.txt' is different from 'myfile.txt'). This is rarely needed for typical Mac usage and can cause compatibility issues with some applications.
  • Mac OS Extended: This is the non-journaled version. It's generally not recommended as it's more susceptible to data corruption.
• Scheme: This option appears when you select the parent drive. For most modern Macs (Intel and Apple Silicon), GUID Partition Map is the correct choice. Older Macs might use Master Boot Record (MBR), but GUID is the standard for current Apple hardware. If you are formatting for compatibility with very old PowerPC Macs, you might consider Apple Partition Map, but this is highly unlikely for typical users today.

Step 6: Erase the Drive

Once you have selected your desired Name, Format (Mac OS Extended (Journaled)), and Scheme (GUID Partition Map), click the 'Erase' button in the dialog box. Disk Utility will warn you again that all data will be lost. Confirm that you wish to proceed.

Step 7: Wait for Completion

Disk Utility will now format the drive. This process can take anywhere from a few seconds to several minutes, depending on the size and speed of the drive. Once it's complete, you'll see a confirmation message. Click 'Done'.

Your drive is now formatted with HFS+ and ready for use.

Important Considerations

• Data Loss: Always back up your data before formatting any drive. The 'Erase' function is destructive.
• APFS vs. HFS+: For most current Mac users, APFS is the preferred and more modern file system, offering better performance and features, especially on SSDs. Only format to HFS+ if you have a specific compatibility requirement.
• External Drive Formatting: If you need to use the drive with both macOS and Windows computers and require read/write access on both, consider exFAT instead of HFS+.