Ever download a folder full of files, only to notice all of the documents inside are zipped shut and encrypted—basically the digital version of Fort Knox? These are examples of the ever-wonderful, yet ...

When was the last time you had to create a zip file? Personally, I have to interact with those types of files all the time (either receiving or sending them to various clients, family, and friends).

You can unzip a file on a Mac by double-clicking on it, or by right-clicking and selecting "Open." The unzipped file will expand its content into a folder on your ...