Yesterday, I zipped up something using 7-zip on the PC, using a password for the zip file. So if I copy the file to another PC and unzip, it asks for the password and restore the file. However, if I copy the file to a Mac with Snow Leopard and double click on that file, it will simply say, can't unzip the file. (Archive Utility was the app).
For me, since I know UNIX, I tried to open up Terminal and typed in
and it actually asked for the password and unzipped for me, but I just wonder, what about if I don't use Terminal, or for people who are not familiar with the command line, how can it be done?