Thanks to the heroic work of Nicholas Nethercote and Julian Seward, the Mac OS X port of Valgrind is now available on Valgrind's trunk. This is a big step forward towards an official Valgrind release with Mac OS X support.

For those of you with Snow Leopard seeds, Valgrind won't work. Valgrind operates at the low-level unsupported guts of the kernel/Libc interface. When the kernel and Libc change, Valgrind needs to adapt or die. Valgrind support for Snow Leopard will not be available until the open-source release of Snow Leopard's kernel and Libc at the earliest, which in turn is not before Snow Leopard itself ships.