DrScheme: DrScheme from the PLT Organization
Version: This is version 209 of DrScheme.
Installing: First, you can download plt-209-bin-ppc-osx-mac.dmg from the CD-ROM, and save it to your hard disk. Then, read the installation instructions that come with DrScheme.
Using DrScheme with CS 61A or CS 3: The CD has setup files for DrScheme for CS 61A in the CS 61A section, and for CS 3 in the CS3 section.
Note: This version of Dr. Scheme is not supported by operating systems older than OS X. For other versions of Dr. Scheme that are supported by older operating systems, please visit Dr. Scheme website
More information is available at the web site.