Note that this isn't too long after Apple abandoned efforts to bring ZFS into Mac OS X as a potential default filesystem. Patents were probably a good reason, given the Oracle buyout of Sun, but also a bit of "skating to where the puck will be" and realizing that the spinning rust ZFS was built for probably wasn't going to be in their computers for much longer.
> Patents were probably a good reason, given the Oracle buyout of Sun
There is no reason to speculate as the reason is know (as stated by Jeff Bonwick, one of the co-inventors of ZFS):
>> Apple can currently just take the ZFS CDDL code and incorporate it (like they did with DTrace), but it may be that they wanted a "private license" from Sun (with appropriate technical support and indemnification), and the two entities couldn't come to mutually agreeable terms.
> I cannot disclose details, but that is the essence of it.
More evidence they thought hdds were on their way out was the unibody macbook keynote. They made a big deal about how the user can access their hdd from the latch on the bottom without any tools as they said ssd was on the horizon.
> Apple File System uses checksums to ensure data integrity for metadata but not for the actual user data, relying instead on error-correcting code (ECC) mechanisms in the storage hardware.[18]
