ZFS in Latest Leopard Builds [Update] - MacRumors
Skip to Content

ZFS in Latest Leopard Builds [Update]

Several sites are reporting on ZFS support that is now built into the latest build of Mac OS X (Leopard) which was seeded last week.

The ZFS team at Sun was contacted by Apple in April about porting ZFS to Mac OS X. Arstechnica previously discussed advantages of ZFS as a file system. These include

- Efficient storage and handling of very small files.
- Logical volume management through a pooled storage model. (Example/Description)
- Improved data integrity using checksums on all data.
- Snapshots

Mac4Ever first posted a screenshot of the ZFS formatting option now in Leopard:

zfsleopard

More information on ZFS is available at the ZFS homepage and Wikipedia.

Update: While ZFS support appears to be preliminarily in the newest Leopard builds, if you try to format a disk image using ZFS, the formatting will not complete. This is a known bug.

Popular Stories

Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro and iPhone Ultra: Pre-Orders and Release Date

Thursday July 30, 2026 6:12 am PDT by
Apple has yet to reveal when the iPhone 18 Pro and iPhone Ultra will be announced and released, but the dates usually follow a familiar pattern. Labor Day is September 7 this year. The last time the holiday fell on that day was in 2020, but the iPhone event that year was delayed until October due to the COVID-19 pandemic. So, the last time Labor Day was on September 7 in a normal year was in ...
macbook ultra

MacBook Ultra's New Design Won't Stay Exclusive for Long

Thursday July 30, 2026 6:00 pm PDT by
The touchscreen and the OLED panel have dominated discussion about Apple's next high-end laptop, but the redesign wrapped around them may prove to be an equally consequential change, largely because it is not expected to stay unique to the machine for long. Bloomberg's Mark Gurman last week laid out Apple's plan to refresh every Mac it sells over the next two years. In the report, he...
Apple Event Logo

Apple Working on All-New Operating System

Wednesday July 29, 2026 11:39 am PDT by
Apple is developing an all-new operating system that is essentially a mix of tvOS, watchOS, and iOS, according to Bloomberg's Mark Gurman. In a report this week, he said the operating system will feature a grid of icons, widgets, and apps, along with customizable clock faces. The new software platform is intended for Apple's long-rumored smart home hub. With built-in facial recognition,...