Among the new features Apple touted in Leopard was data detectors in Mail.app. The idea is that if somebody sends you an email with a street address in it, for example, Mail.app can detect that it's a street address and add it an Address Book contact with just a couple of clicks. Unfortunately, while the basic idea isn't bad, sometimes you just want to copy something and the data detectors simply get in the way (and leads, in my case at least, to some gratuitous cursing).

Well, Michael Tsai has found the solution with a hidden preference. All you have to do is type in (or copy and paste in) one line to the Terminal and the data detectors will be banished from Mail.app. Head on over to Tsai's post for full details and kiss the cursing goodbye.

[via Daring Fireball]

I'm always, well, tickled by the things that can happen when you use Terminal commands that begin with "defaults write" -- thus changing the preferences for applications, the Finder, and more, often in ways that you can't accomplish via GUI pref settings. I also get a certain warmness from Leopard's Data Detectors, but I have to confess I rarely use them. It's fun to watch the things that Mail can pick up on, and I've often tested to see what exactly iCal will make of it, but I guess some people just get better emails than I do. Strangely, I do get dates and info via instant messaging on a more regular basis.

You can enable Data Detectors in iChat with one simple command in Terminal:

defaults write com.apple.iChat EnableDataDetectors 1

You can disable it using the same command, but change the '1' to a '0.' Now you get the fun job of calling your closest Mac-using relative and explaining Terminal so they can use a feature that Apple hid from public view for what I can only assume were valid reasons. I hope your aunt has her screen-sharing figured out.

[via Mac OS X Hints]