How to Tag a File on Your Mac
New in Mavericks is the option to tag a file — a potentially indispensable feature on the Mac that makes it easy to find a document you’ve created or to organize all your files by project.
You can tag iCloud documents or documents that reside on the Mac. Tags work with other types of files, too, including pictures. When you click a tag name in Finder, you can find the files you’ve assigned to that tag. You can also search for a tag in the Finder search box.
So how do you assign a tag? When you save a file, you see a Tags field in the Save dialog that appears. Clicking in that field summons a list of any recent tags you’ve set up, along with color-coded tab options that Apple supplies. Click one or more of the tags to assign those tags to your file. You can assign multiple tags, as well.
If any of your current tag names is no longer relevant, you can give it a new tag name. Of course, any existing files that have the old tag name will now get the new tag moniker.
That’s not the only way to assign or create a new tag. In Finder, select a file and click the Tags button. Then either click an existing tag name or type a new name. Tags appear in the Sidebar, with the most recently used tags appearing at the top.