System Requirements

Unsanityª Echo requires a PowerPC 603e or better (PowerPC G3 processoror better, iBook, or iMac are HIGLY recommended.); MacOS 8.6 or later, including Mac OS X; and at least 12 Megabytes of free RAM (16 recommended).

All this Information is available in Apple System Profiler.

Mac OS 8.6 is a free upgrade to users with Mac OS 8.5 or 8.5.1. It is available at http://asu.info.apple.com/swupdates.nsf/artnum/n11386