GNU Mach is currently used by the GNU Hurd.
GNU Mach remains compatible with Mach 3.0.
The majority of GNU Mach's ?device drivers are from Linux 2.0. They were added using glue code, i.e., a Linux ?emulation layer in Mach.
GNU Mach runs on x86 machines. See the hardware compatibility list and information about ports to other architectures.