Raspberry Pi releases OS for older PC and Mac
Operating system Pixel OS for microcomputers Raspberry Pi is now available on other hardware platforms. OS based on Debian has very modest system requirements (starting with i386 with 512 MB of memory), so that it can run on old PC and Mac. At the same time, Pixel OS easy to use and it is available a variety.
The OS image from the developers website allows you to boot without installation, directly from a disc or flash drive. In the latter case, you can save all the changes, so they will be visible on the next boot. The OS comes with a Suite of applications including a browser.
Until the OS is in the experimental stage, so it may not work on all systems, but the developers intend to release updates.
Source: Raspberry Pi