Hi, I have this same problem on my Mac. I did a search for the file "wallet.dat" and can't find anything. According to the Wiki, they should by default do to library>app support>bitcoin, but in App support, there is no Bitcoin folder. I want to back up for security purposes. Can anyone help?
Make sure you are looking in the "Application Support" folder within your home folder, as opposed to the other "Application Support" folder at the root level of your hard disk.
That is, the file is here: