But HFS+ and Core Storage still lacked key features of newer, more modern filesystems. Apple has tweaked HFS+ and built on top of it to extend its capabilities over the years, most notably with Core Storage in Lion, a logical volume manager that enabled the full-disk version of FileVault encryption and Fusion Drives, among other features. Now, as long as you’ve got a Mac with all-flash storage, you’ll start using it right after you install High Sierra.ĪPFS replaces HFS+, a 19-year-old filesystem introduced in Mac OS 8.1 (and one that merely built on top of 1985’s original HFS from System 2.1). The Apple File System, or APFS, was first shown to the public as an unfinished beta in macOS Sierra, one that was mostly feature-complete but still couldn’t be used for bootable volumes or accessed outside of the command line. This one has been a long time coming: the Mac finally has a new default filesystem. News of this issue comes more than a year after Apple patched three zero-day vulnerabilities that could allow an attacker to silently jailbreak an iOS device and spy on victims.Further Reading A ZFS developer’s analysis of the good and bad in Apple’s new APFS file system It's recommended that affected users implement the fix and follow the tech giant's guidance as soon as possible. The fix not only addresses the issue spotted by Mariano but also addresses an issue previously identified by Patrick Wardle of Synack whereby an attacker could extract passwords from the Keychain.Īpple has also released a support document explaining how users can best protect their encrypted APFS volumes after they've installed the supplemental update. Since receiving the developer's report, however, the tech company has released a supplemental update for machines already running High Sierra with SSD storage. It's unclear if Apple responded to Mariano. Anyway, it was already reported to Apple by me." "I really don’t know how this went unnoticed by Apple (and anyone else).
Mariano was surprised by the issue, which according to MacRumors appears to affect only the Disk Utility of machines with SSD storage and not the process of creating an encrypted APFS volume in Terminal with the diskutil command line utility.
A screenshot of the APFS log-in window showing Mariano's password in the password hint.
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