The filesystem, APFS, isn't ZFS but it certainly has many of the same features. Like ZFS it does copy-on-write, so it gets all the benefits like snapshots and cloning.
Another ZFS like feature is "space sharing", you can have multiple volumes on the same chunk of physical disk.
It also has atomicity to ensure that file metadata and the file can't get out of step if there is a crash/power outage (including native support for the macOS extended attributes).
The new version of TimeMachine that uses APFS is going to work an awful lot faster/better than the current one...
Given that they'll be using it on the Apple Watch, you can start to understand technical, rather than legal, reasons that they ditched ZFS.
It isn't going to be used in actual products until 2017 though. It will be great to have something with at least some of ZFS's features on my desktop machine.
There is no mention of ZFS style self validated/healing checksum features. And their RAID story is the existing software RAID0/1/JBOD run over the top of APFS
http://arstechnica.co.uk/apple/2016/06/apfs-apple-new-file-system-dev-details/https://developer.apple.com/library/prer...0016999-CH2-SW1
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