This release of Lubuntu contains:
A Pentium II or Celeron system with 128 MB of RAM is probably a bottom-line configuration that may yield slow yet usable system with a standard lubuntu desktop.
12.10 32 bit ISO require your CPU to have Physical Address Extensions, or PAE. "PAE is provided by Intel Pentium Pro and above CPUs, including all later Pentium-series processors (except most 400 MHz-bus versions of the Pentium M)." - If you have a NON-PAE CPU and would like to install Lubuntu 12.10, please see this link or you can use Lubuntu 12.04 instead.
For PowerPC, it is known to run on a G4 running at 867MHz with 640MB RAM.
For Intel based Macs, lubuntu should run on all models.
To download Lubuntu and see the various options available head over to Get Lubuntu. This section also discusses both the standard installs and those required for computers with low memory (RAM), old chipsets (i586), PowerPC, Mac and low disk-space (netbooks).
PPC has several issues and workarounds, please refer to the documentation on the wiki
On some GTK3 applications, some tooltips have a black background and a black font. (1065941)
Execute in terminal is not working in pcmanfm (975152)
Blank boxes appear when hardinfo is started, and needed to be closed before accessing to the application (1029212)
Different spacing for the icons on the right corner of lxpanel (1056547)
Software sources takes 30 seconds to load (1051723)
Clicking on Ibus icon start the deamon, but doesn't display an icon (1041933)