Hazel users who have already installed OS X Mavericks have reason to be cheerful today: An update to the app brings support for Mavericks Finder tags, letting you do all kinds of neat things with your files, automatically based on how you tag them.
Hazel, for those who haven’t yet experienced its sublime awesomeness, is a background app which processes files and folders based on rules you set up. At its simplest it can be used to do things like filing your stuff; you can have it watch your Downloads folder and send movies and music to iTunes, PDFs to Dropbox and so on. But it goes so much deeper, able to peek inside files and read dates therein, or to do things to photos based on EXIF data (whether you used flash or not, for example).
Hazel already worked with Finder labels, the precursor to tags, but now it can perform its operations based on tag, and also apply tags to the files. And if you already have rules based on Finder labels, don’t worry! They will keep working. It’s just that you red label is now a tag named “red.”
Existing users get the update for free, new users should get their credit cards out now an pay the $28 license fee.