Every so often I'll go through my Mac's hard drive and delete stuff that's just sitting around. The downloads folder fills with junk especially fast. I also download lots of software out of curiosity, and after a few months my applications folder is bulging.

While installing Mac software is often as easy as a click, uninstalling takes a bit more work. Rather than hunt around for preference files, etc. I use AppZapper. By simply dropping an app onto the cute raygun icon, AppZapper finds all of that application's related files -- preferences, caches, etc. -- and lists them in a window. With a click, it "zaps" them (you can disable that sound effect) to the trash.

Fortunately, they aren't deleted for good, so you can recover something zapped by mistake. Once you're ready, simply empty the trash to reclaim all of that precious hard drive space. Pro tip: Move it to your Finder Window's sidebar for easy drag-and-drop access.

AppZapper requies Tiger or Leopard and the $12.95US pricetag includes free upgrades for life. There are other apps that do this, yes, but AppZapper works perfectly for me.

Update: Some readers are reporting that AppZapper doesn't work properly under Leopard. It's never given me any trouble, but if you want an alternative, Hazel is a good one.

This time around in Mac 101 I thought it would be good to talk about uninstalling applications on the Mac, especially for the recent switchers out there. Unlike Windows, Mac OS X does not have a native utility for uninstalling applications. Most (though not all) applications are installed just by dragging and dropping them into the Applications folder, and most are similarly got rid of by dragging them to the trash. However, when you do that you often leave behind preference and support files, especially in your user Library folder hierarchy (/Users/yourname/Library, as distinct from /Library which is "owned" by Mac OS X).

While you can root these files out yourself, it's sometimes far from obvious where they are. To resolve this, a new class of uninstallers have appeared on the scene to address the problem. One of the first was AppZapper ($12.95), but many more have arisen like AppDelete (donations requested), SuperPop ($15), and CleanApp ($10). With most of these you choose the application you want deleted by dropping it on the uninstaller (or choosing it from a list); hit a button and the application plus its support files are sent to the trash. Taking a slightly different approach, Yank ($19.95) actually monitors your system while you are installing applications and creates a "Yank File" that records the location of everything created by the application. You then uninstall by running the Yank File.

Finally, there are uninstallers that integrate with the Trash itself, requiring no separate interface. Into this class fall Hazel ($21.95), which also does other automatic file management tasks, and AppTrap (donations requested). What's great about these last two is that you can just drag an application to the trash and they will automatically look for and offer to delete the support files. Indeed, this seems to me to be the most Mac-like and elegant approach. For my own part I mostly just use Hazel, though I still throw things at AppZapper now and again.

Spring Cleaning, the system optimization, cleaning, and uninstaller utility from Smith Micro is now a Universal Binary. Completely rewritten from the ground up, version 9 introduces a wealth of new features and tools, such as a Task Scheduler, Permissions Fixer, a Housekeeping Scripts Runner, Spotlight Index Rebuilder, System Cache Cleaner, and others, in addition to a reworked interface. $49.99 for the package, or $19.99 for upgrades. Requires OS X 10.4. Although I can't vouch for this application, I will recommend OnyX for folks looking for something similar, and for free. I usually make sure to crack OnyX open every month or so for a bit of housekeeping of my own.

(via Macworld)