Experimental Open Source software that tries to run Mac OS 9 applications on Intel Macs is available now.

SheepShaver lets users run classic applications on their Macs, but does require users have a copy of OS X and a Power Mac ROM image - in other words, at this stage the software is only really useful to advanced users.

The developer promises such applications will run at native speeds on PowerPC-based systems. As well as OS X, the software is available for Linux, Darwin, NetBSD, FreeBSD and x86 Windows systems.