When did first time I am using operating system Mac OS X, I have been confused with how to compressing single file or multiple files. But obviously, Apple make it to be very easy and I shall share it for you that for the first time using Mac OS X. I hope this can help you…
Just follow these steps:
1. Open your Macintosh HD with click on Macintosh HD icon.

2. Locate your files and then select your files that will compressed (you can select it with press Command key and click on icon files).

3. Right click on your mouse or if you are using a laptop you also press Ctrl key and click on one of selected file and then choose Create Archive of xx items (if you are compressing more than one file) or Create Archive of “file_name” (if you are compressing single file).

4. And you will get your .zip file.