StuffIt Expander 4.5 - requires System 7 (7.1.1 or higher) or Mac OS 8. If you are running a System prior to 7.1.1, you should obtain StuffIt Expander version 4.0.1. StuffIt Expander is Apple event aware, 32-bit clean. Expander is also Power Macintosh, AV, ﾕ040 cache, and virtual memory compatible. Expander has an intelligent background processing scheme that makes it perfect for expanding groups of files so that you can continue to do other things with your computer.
