I Googled .7z and followed link to this thread http://forums.macrumors.com/showthread.php?t=105216 dated 01-15-2005. At that time there was nothing available besides a command line application. Because I do not work in Terminal I registered here hoping to find a current app. When I put .7z in search field here, 900 + results showed up, but there was no mention of .7z at all in the first two pages. Because I figured it was not going to get any better here I am. So the question is, is there an app to open, or convert a .7z file to something that can be opened by Mac OS 10.4.11? Thanks in advance for any help.