Originally Posted by vansmith

You can make a hidden folder by putting a dot at the beginning of the name. Unfortunately, Finder won't let you do this. There is one way to do it though.

1. Open up Terminal (/Application/Utilities/)
2. Type the following, replacing <dir> with the directory where you want to put the hidden folder: cd <dir>
3. Type the following, replace <name> with the name of the folder you want to hide: mkdir .<name>. It is essential that there is a dot in front of the name (this is what makes it hidden).
4. That folder won't show up in Finder. If you want to get to it, open Finder and push Command-Shift-G. In the box that drops down, type in the directory of the hidden folder. For instance, if the folder was called .me in Documents, I would type ~/Documents/.me (~ is shorthand for your home directory). Note that if someone else does this after you, they will see that you typed in that directory.