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Introduction: Apple Pushes Another Major Step Toward a Fully APFS Future
Apple is preparing another significant change for the Mac ecosystem, one that could affect users who still rely on older storage formats. Beginning with macOS 28, encrypted volumes formatted with the legacy Mac OS Extended (HFS+) file system will no longer be supported. While this change won’t impact most modern Mac users, professionals and longtime Apple users with archived external drives or older backup devices should prepare now.
The announcement marks another milestone in
Apple Officially Deprecates Encrypted HFS+ Volumes
According to
The restriction applies specifically to encrypted HFS+ disks. Standard, unencrypted HFS+ volumes will continue to work normally, meaning only users relying on encrypted legacy storage devices need to take action.
Although Apple did not explain the exact reasoning behind the decision, industry observers see it as the natural continuation of Apple’s migration toward APFS, which has been the default file system since macOS High Sierra.
Unlike HFS+, APFS was designed specifically for modern SSDs, stronger security, snapshots, cloning, and native encryption without relying on the older CoreStorage layer.
Why Apple Is Making This Change
Apple introduced APFS several years ago with one clear objective: replace an aging file system that was originally built for hardware designed decades ago.
Compared to HFS+, APFS provides numerous advantages:
Native encryption integrated into the file system
Better SSD optimization
Faster file cloning
Snapshot technology for backups
Improved crash protection
More efficient space sharing
Modern architecture designed for current Mac hardware
Maintaining compatibility with encrypted HFS+ volumes requires supporting legacy technologies such as CoreStorage. Removing this dependency simplifies future macOS development while allowing Apple engineers to focus entirely on APFS improvements.
macOS 26 Will Warn Users Before the Upgrade
Apple is giving users plenty of notice.
Beginning with macOS 26, Macs may display notifications whenever an encrypted HFS+ drive is connected.
The warning will identify the incompatible volume by name, allowing users to prepare well before upgrading to macOS 28.
This proactive approach reduces the likelihood of users discovering compatibility problems only after installing the new operating system.
How to Check Whether Your Drive Will Be Affected
Users can easily verify whether a storage device is impacted.
Open Disk Utility, switch the view to Show Only Volumes, and select the storage volume from the sidebar.
If the information panel shows both:
Mac OS Extended
Encrypted
then the drive will no longer be supported under macOS 28.
Typical affected volumes may display something similar to:
CoreStorage Logical Volume • Mac OS Extended (Case-sensitive, Journaled, Encrypted)
Apple also reminds users that Mac OS Extended is commonly known as HFS Plus (HFS+).
Two Solutions Apple Recommends
Apple provides two supported migration paths.
Option One: Reformat the Drive
The first option is the cleanest.
Users should:
Back up all important files.
Erase the storage device.
Reformat it using APFS or APFS (Encrypted).
While this permanently removes existing data, it guarantees full compatibility with future macOS releases.
Option Two: Decrypt the Existing Volume
Users who wish to preserve the current format temporarily can decrypt the storage volume instead.
The process involves:
Connecting the drive.
Unlocking it with its encryption password.
Choosing Decrypt from Finder.
Waiting for decryption to complete.
Large drives may require considerable time before the process finishes.
Apple notes that encrypted Time Machine backup disks cannot use this method.
Converting to APFS Without Erasing Data
After the drive has been decrypted, Apple allows users to convert compatible HFS+ volumes directly into APFS.
This conversion avoids a complete erase while moving the storage device onto Apple’s modern file system.
After conversion, users may enable APFS encryption again, restoring strong security while remaining fully compatible with future versions of macOS.
Why Most Mac Users Probably
The majority of modern Mac owners are unlikely to encounter this issue.
Since APFS became
The users most likely to be affected include:
IT administrators
Video editors
Long-time Mac enthusiasts
Businesses with archived storage
Users maintaining older external hard drives
Legacy backup collections
These users often preserve data on older HFS+ encrypted disks that have remained unchanged for years.
Apple’s Long-Term Vision
This decision reflects
Over the last decade, the company has systematically removed aging technologies to simplify macOS development and improve security.
Examples include:
Removal of 32-bit application support
Transition from Intel processors to Apple Silicon
Deprecation of kernel extensions
Adoption of APFS
Increasing hardware security integration
Ending encrypted HFS+ support follows the same pattern—reducing reliance on legacy technologies while strengthening the operating system’s long-term architecture.
Deep Analysis
Command: Analyze the Technical Direction
Apple’s decision is less about removing a feature and more about eliminating an outdated storage infrastructure. CoreStorage encryption predates APFS and requires additional compatibility layers that modern macOS versions no longer need. By retiring encrypted HFS+ support, Apple reduces engineering complexity and minimizes potential security risks associated with maintaining legacy code.
Command: Evaluate Security Implications
From a cybersecurity perspective, APFS provides a more robust foundation than HFS+. Native encryption, stronger integration with Apple’s hardware security features, and improved data integrity make APFS the logical long-term standard. Organizations still relying on encrypted HFS+ volumes should view this announcement as an opportunity to modernize their storage environment rather than simply a compatibility issue.
Command: Assess Enterprise Impact
Businesses with extensive archival storage may face the greatest workload. IT departments will need to inventory external drives, verify file systems, decrypt or migrate affected volumes, and educate employees before macOS 28 becomes widely deployed. Early preparation can prevent unexpected disruptions during future operating system upgrades.
Command: Examine User Experience
Apple’s decision to begin warning users in macOS 26 demonstrates a gradual migration strategy. Providing compatibility alerts years before enforcement allows individuals and enterprises to transition at their own pace, reducing the risk of data access issues after upgrading.
What Undercode Say:
Apple’s latest announcement highlights an ongoing philosophy that has defined the company for years: prioritize modernization even if it means retiring legacy technologies. While some users may view the end of encrypted HFS+ support as inconvenient, the broader direction aligns with industry trends toward simplified and more secure storage architectures.
From a cybersecurity standpoint, maintaining legacy encryption frameworks indefinitely introduces technical debt and increases the attack surface. APFS was engineered with modern encryption, snapshot capabilities, and SSD optimization in mind, making it significantly more suitable for today’s hardware ecosystem than HFS+.
Organizations should not underestimate the importance of this transition. Many enterprises retain archived drives for legal, financial, or operational reasons, and some of these may still use encrypted HFS+ volumes created years ago. Conducting a storage audit before deploying macOS 28 should become part of standard IT planning.
Home users are less likely to encounter issues, especially if they purchased their Mac within the last several years. However, photographers, video editors, software developers, and longtime Apple enthusiasts often keep legacy external drives for historical projects. Those users should inspect their storage devices well in advance.
Apple’s early warning system in macOS 26 is a positive move, giving users ample time to migrate rather than forcing immediate action. It also demonstrates a careful balance between innovation and customer transition.
This change is also consistent with
From a digital forensics perspective, professionals handling historical evidence stored on encrypted HFS+ drives should plan migration carefully to preserve data integrity and chain-of-custody procedures where required.
Developers and IT administrators should update internal documentation and deployment policies to ensure newly provisioned external storage devices use APFS by default.
The removal of encrypted HFS+ support is unlikely to be reversed. Instead, users should expect Apple to continue refining APFS and integrating it even more deeply with future hardware and operating system features.
Ultimately, this announcement is less about removing support for an old file system and more about reinforcing Apple’s commitment to a unified, secure, and future-ready storage platform.
✅ Fact: Apple has officially announced that encrypted Mac OS Extended (HFS+) volumes will no longer be supported starting with macOS 28. This information comes directly from Apple’s support documentation.
✅ Fact: Apple will begin notifying users in macOS 26 if they connect an encrypted HFS+ volume that will become incompatible with macOS 28. This advance warning is intended to help users migrate before upgrading.
✅ Fact: Apple recommends either decrypting affected HFS+ volumes or migrating them to APFS. Unencrypted HFS+ volumes will continue to be supported, making the change specific to encrypted legacy storage.
Prediction
(+1) APFS Adoption Will Accelerate Across the Mac Ecosystem
Apple’s decision will likely speed up the final migration away from HFS+, especially within enterprise environments and among long-time Mac users. Over the next several years, APFS is expected to become the universal storage standard across Apple’s desktop ecosystem, enabling deeper security integration, improved performance, and simplified future macOS development while reducing dependence on legacy storage technologies.
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References:
Reported By: 9to5mac.com
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