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CleanMyMac + Apple Trash Can = all you need.

You beat me to it. I used to use AppZapper, but have been using CleanMyMac for a while and LOVE IT. It strips out the excess code in applications (either PowerPC or Intel), extracts language files you don't need for app's, cleans up system files/broken preferences/excess .plists, manage plugin's for Finder/Safari/etc., and a whole lot more. Great app!
 
They don't need a dedicated application or anything. Just make it so that when you delete an application file, you get a dialog that says "Would you like to also remove this applications support files?" or something similar.
 
If Apple comes out with another OS without an "uninstall app" feature to easily uninstall app's then they have mental problems...

lol but i agree a bit. they could easily implement an uninstall feature in the app store app or some other way.

not sure why it's still not available and you have to go through third party apps.
 
...and then there's that who WINSXS folder (google it) that Windows creates... people wonder where all of their drive space went...
 
In Lion, you can not uninstall any of the preinstalled apps. Not even the Chess app. WTF?!!!!
 
I use a program called TrashMe, that does a good job of finding all related files to a program and deletes them along with the program. I'm just glad OS X doesn't have a crappy error-prone registry like windows.
 
Ok, a lot of you seem to be arguing that an uninstall feature is unnecessary since you can just drag the app to the trash and be done with it. I agree that most of the time you are right, but there are plenty of applications that don't work that way and leave crap on the system that can mess it up. If you use anything with a dongle, or with certain license managers, just trashing it can cause problems. Even the manufacturer's uninstall programs don't necessarily work. I uninstalled smoke recently using the uninstaller it came with and my computer wouldn't sleep. I went to Autodesk's site and followed their manual uninstall instructions and it still wouldn't sleep. I finally tracked it to a daemon that was calling up the license file (which of course had been uninstalled) and was keeping my machine awake.

The point is OS X is an elegant operating system and an uninstall that was as elegant and flawless as much of the rest of the system would be great.
 
You can't put Chess in the Trash because "it's required by OS X". WTF?! Chess????
 

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