How to Unzip a Mac Fileby Katrina Matterhorn
Zip files are files that have been compressed due to their size. This can help when you need to download a large number for files for an application or even a game. Zipping them makes it smaller and more compatible with computer storage limits. Both Windows Vista and later as well as Mac Tiger OS X and later have built-in utilities to unzip Mac files without having to download any additional software.
Unzip a Mac File on a Mac
Locate the Mac file you wish to unzip.
Double-click the Mac file. It should open up as a series of folders.
Select the folder you wish to unzip. Double-click it. It should open up the file within the folder.
Unzip a Mac File in a Windows-based PC
Double-click on the Mac folder from the location where it is saved on the Windows PC. This will open up the contents of the folder.
Locate the Mac file inside the folder that you wish to unzip.
Double-click the file. The Mac file will open and will now be unzipped.