by Dan Frakes, Macworld.com  

You read about them on message boards and Web sites, in chat rooms and email: Someone’s Mac is having problems, and a helpful soul writes, “Download XYZ and clean your caches.” Or a user wants to know how to tweak a specific setting in Mac OS X, and several people chime in with suggestions for obscurely named utilities such as Onyx, DoktorKleanor, and TinkerTool. There are many of these software titles out there for Mac OS X, but they all have one thing in common: They offer ways to access settings and features of Mac OS X that aren’t easily available via the standard interfaces—System Preferences, applications, and various preferences dialogs. These utilities also tend to let you perform several “maintenance” tasks that may or may not be effective (that’s the topic for another article). As a group, I call these software titles “tweaking” utilities because they help you tweak your Mac’s features and performance.

Over the past couple years, I’ve seen more and more of these tweaking utilities crop up, many of them very similar to others on the market. Since I’m often asked which ones I recommend, I decided it was time to check out as many as I could to see if any stand out.

Caveats and cautions

Before I get into my discussion of the various tweaking utilities, I want to make something clear: With few exceptions, these utilities simply run Terminal (shell) commands in the background. In other words, few do any “magic” of their own; instead, they provide a graphical user interface (GUI) for Mac OS X features and settings that would otherwise be available only to those proficient with Terminal and Unix shells. The most obvious (and transparent) example of this is the utility maintain1 ; clicking a button in this utility actually opens a Terminal window to run the corresponding Unix command—often something as basic as

top

ps

Now, some “purists” feel that such utilities are a scourge upon the earth, since, in their minds, these utilities keep people from actually learning about Unix and the shell. I happen to live in the real world, where most of the people who use these utilities would never, ever, ever pick up a book on Unix. Their Unix skills are limited to copying a command from a Web site, pasting it into Terminal, and pressing the Return key—and they’re perfectly OK with being such Terminal neophytes. For these users, tweaking utilities provide easy access to those features OS X has hidden beneath the surface.

That said, the concomitant risk of these utilities is that some of them place dangerous tools in the hands of inexperienced users. (The fact that many tweaking utilities require your admin-level username and password to run should be a big red flag.) Although these apps can perform benign actions such as enabling the Dock’s hidden options, they can also do more serious things such as deleting virtual memory swap files, deleting preferences files, and munging low-level network settings. One wrong click and you could find your computer working very differently—or not working at all. So an emphatic word of caution: If you use one of these utilities, click only those buttons you understand; don’t click wildly because the various options sound interesting or because you’re intensely curious as to `what they do.

On another safety-related note, before using one of these utilities, make sure you have the latest version—and be sure that version is compatible with the version of Mac OS X installed on your Mac. When using a utility that makes modifications to the OS, compatibility is especially important.

Tweaker table

When I first started looking at the various tweaking utilities, I downloaded each one that I found and jotted down what each did. This approach turned out to be, shall we say, less than ideal: I found far more titles than I expected, many of which provide scores of features. (It appears that for at least some vendors, there’s a race going on to see who can include the most tweaks in their software.) So when my table quickly grew beyond what could be legibly represented in my notebook, and I realized that I wasn’t going to be able to give a qualitative narrative about each title, I turned to an Excel spreadsheet. When all was said and done, I ended up with 30 current utilities—a dozen or so others are no longer supported—and over 400 possible “tweaks”!

Because the Web isn’t an ideal medium for presenting such a large table, we’ve included below a summary of the included utilities; we’ve made the original available for download as an Excel spreadsheet and an OmniOutliner 3 document. (If you have OmniOutliner, I recommend downloading that version, as it’s easier to read.) The full table lists every task I found could be performed by any of these various utilities, along with which utilities can perform each task.

A few notes about the full table:

Which to use?

One look at the full table and it’s easy to get overwhelmed—there are 30 different utilities and no two provide the same features or interface! So, assuming you need such a utility, which do you choose? If you have a specific setting you need to change, then you can use any of the titles that can make such a change. If not, here’s a summary of a few of my favorites. (See the full table for complete details on each title.)

fsck

Finally, an alternative to these GUI utilities is CLIX ( ), which I covered in Mac Gems back in December 2004. CLIX is basically a database of Unix shell commands, each of which can be run by double-clicking that command. Many of the features offered by the tweaking utilities covered here are available via CLIX’s shell commands. The downsides to CLIX are that its interface is fairly spartan and in many cases you’ll need to run multiple commands to accomplish what these GUI utilities offer via a single button. On the other hand, CLIX shows you the exact command to be run so you know precisely what’s going to happen—and possibly learn a bit about Unix in the process.

Do you have a favorite tweaking utility that’s not included in our roundup? Let us know in the forum thread for this article, accessible via the link below.