Mac users interested in How to unzip multi volume zip file generally download:
Compress your data into ZIP archives, protect them with a password, and share them via email. Edit files within a ZIP file without the necessity to extract them. Open a wide range of common compressed file formats, including ZIPX, RAR, LHA, 7z, WAR, and JAR.
Check out a suite for building and updating archives. Work with files and folders to generate their compressed copies, add or remove items to existing archives in such formats as RAR, ZIP, TAR, etc. Extract the materials from compressed packages without damaging them.