The developer doing this work, "Winocm", explained about the work it is "an open-source port of the XNU (iPhone OS/Mac OS X) kernel to ARMv7-A (soon AArch64 and ARMv6/v5!) platforms. The kernel is very bare in its implementation and needs a lot of work."
His current XNU kernel is able to handle running simple user binaries like bash, ls, and grep, but more advanced commands are not yet functioning. Among the platforms where this Apple XNU is tested include the BeagleBone Black, ARM RealView, and TI BeagleBoard xM, among other ARM-based platforms.
Those interested in more details on this latest open-source work out of Apple's XNU kernel can see the Winocm.com blog post.