This guide to finding lost files in Mac OS X is essential reading for anybody who works on a Mac. Learn how to quickly find any missing file on your Mac and you'll get things done much faster.

If you receive File in Use. The action can't be completed because the file is open in another program even if file is closed in another program, see this.

If you open an attachment from within your email program and then save it, the file may seem to have disappeared. Similarly, files you download from the web can be hard to find if you don't know ...