On the topic of older machines:
Olive will run any system that supports the Java Runtime Environment 1.6 and above. This includes Windows XP as well as other non-Microsoft operating systems.
As for hardware, I've optimized the studio environment to support extremely high channel count live editing on more modern systems (i.e. less than 4 years old). However, the show playback system, known as Olive US (Universal Server), will have the ability to run optimized, pre-compiled shows and should provide extremely high channel count performance on systems up to 10 years old.
Within a couple of months we should be able to see what kind of performance the older systems are capable of.
Thank you,
--Matt