At the Gartner Data Center Conference in Las Vegas, Nevada in late 2007, Sine Nomine demonstrated OpenSolaris running on IBM System z under z/VM.
"[3] At the SHARE conference on 13 August 2008, Neale Ferguson of Sine Nomine Associates presented an update on the progress of OpenSolaris for System z.
"[4] In October, 2008, Sine Nomine Associates released the first "prototype" (it lacks a number of features such as DTrace, Solaris Containers and the ability to act as an NFS server) of OpenSolaris for System z to the public.
Because the port depends on recently defined z/Architecture processor instructions, it requires a System z9 or later mainframe model and will not run on older machines.
It also requires the paravirtualization features provided by z/VM; it will not run on "bare metal" or in a logical partition (LPAR) without the z/VM hypervisor at Version 5.3 level or later.