Filed under: TUAW Tips

I've previously demonstrated how to use LaTeXiT to create and display complex math formulas and other symbols, and thank you readers for the additional recommendations!

While providing a means to display almost every imaginable existing symbol or character, a LaTeX-based solution may prove too complex and unnecessary for some. For the less "mathletic," Mac OS X's built-in character viewer is one of the easier ways to display characters of all sorts.

To enable the character viewer, open Mac OS X's System Preferences and select the "Language & Text" icon. Once there, click on the "Input Sources" tab and place a checkmark next to the "Keyboard & Character Viewer" box and "Show input menu in menu bar" box. The Keyboard & Character Viewer is now accessible on your menu bar.

Now, displaying special characters on your document, email, or whatever it is you're working on is just a drag and drop away.

Although Firefox can be dressed up with a host of extensions, many of which are great, most of the time I like my browser to be a plain Jane. That's why I prefer using Safari most of the time. Well this, and the fact that I can't stand the jerky scrolling of Firefox (when using a mouse scroll ball) compared to Safari on the Mac.

One of the neat features in Safari is its "Activity" window, which you can use to examine each element of a webpage -- be it an image, audio file, or video file. To access it within Safari, click on "Window" and select "Activity." Whatever opinion you may have of Flash, much of the content on the web -- both audio and video -- plays through a Flash-based media player. As the iPhone doesn't support Flash (except sorta kinda), the Activity Window provides a means to download otherwise unplayable content onto your computer, which you can then transfer to your iPhone. Opening an element (say an MPEG-4 video) listed in the Activity Window is as simple as double-clicking it. Alternatively, you can also copy the URL of the element and paste it somewhere to use in another app.

Mac OS X 10.6 Snow Leopard introduced a lot of under-the-hood changes and many are not very obvious. One such change is to the authentication requirements for logging in remotely via SSH.

In 10.5 logging in remotely via SSH was a pretty standard affair. In 10.6, however, security has been beefed up a bit to require case-sensitive login credentials. While this requirement has already been imposed on passwords, Snow Leopard now requires a case-sensitive user name as well.

In other words, when logging in via SSH, Snow Leopard differentiates between the username "aron" and "Aron." This threw me for a loop for quite some time and is another one of the numerous reasons I have held off upgrading my Mac mini to 10.6.

Job Description

The "Reset Network Settings" button on the iPhone not only resets your Wi-Fi settings -- resulting in a clean slate with respect to Wi-Fi access points and their passwords -- it also resets your phone carrier settings. Several months back, I had the darndest trouble with cellular data access. I could place and receive calls, but couldn't get cellular data access no matter what I did. I tried going into and out of airplane mode, turning the phone on and off, and resetting it, all with no luck.

So I decided to call AT&T. Apparently, one of the cell phone towers near my office was having trouble and fell out of and back into commission. And although the tower was back up and running, my iPhone was stuck in cellular data purgatory. AT&T support suggested that resetting the network settings on the device would likely resolve the issue: and it did. Resetting network settings has also helped me resolve an issue I was having with Visual Voicemail on another occasion.

To reset your iPhone's network settings, tap your way to Settings > General > Reset > Reset Network Settings. With great power also comes great annoyances, like having to reconnect to previously remembered access points and having to re-enter passwords.

Smart playlists have been a feature of iTunes since version 3.0 (circa 2002), and they provide a means for you to create automatically-updated playlists that fit a certain criteria. For me, they serve as a hands-off way to stay up-to-date on my latest music and Podcasts, as well as a repository for a certain genre of music. To create a smart playlist, click on "File" and select "New Smart Playlist" (or you can use the command-option-n keyboard shortcut).

If you want a playlist that contains only holiday music, you could specify that the playlist include all songs with either the "Christmas" or "Chanukah" genre tag on it. Because smart playlists auto-update, you needn't worry about adding songs to it: as long as the track's tags meet the criteria, it is automatically included in the playlist -- unless, of course, you choose the "limit to" option, which limits the the tracks in the playlist based on your choosing.

Read more for five of my favorite smart playlists, as well as criteria for how to create them.

Mobile Me's Find My iPhone is a wonderful (relatively) new feature which can help track down your iPhone if it is lost or stolen, but it is not foolproof, and it must be configured before you need it.

Q: "Is it true that Find My iPhone does not work if you have 3G turned off or lose your iPhone where there is no 3G service available (EDGE only)?"

A: False. Find My iPhone works with the original iPhone, which did not even have 3G or GPS capabilities, so it does work with EDGE. If you have a 3G-capable iPhone and disable the 3G (Settings > General > Enable 3G > OFF) to save battery life, "Find My iPhone" will continue to work.

Q: "Will find my iPhone work over WiFi?"

A: True... sort of... Maybe... Not really. In my home I have very little or no AT&T service (or Sprint, or Verizon, or any other cell provider). I do have WiFi all over the house, and Find My iPhone has never failed to help me locate my iPhone when it is "lost" in my house. In order to test it purely over Wi-Fi, I put the iPhone into Airplane Mode (meaning that both EDGE and 3G were both disabled) and enabled Wi-Fi. I asked "Find My iPhone" to locate my iPhone and was told that it was near Orlando, Florida. It was, in fact, in Ohio. I repeated the test and it came back with the same information. Later, I tried the "Wi-Fi only" test from my home, and Find My iPhone could not find my location at all.

However, even in Airplane + Wi-Fi mode I was able to use the "Display a Message" and "Remote Passcode Lock" features. So you may not be able to locate it on a map, but you still may be able to connect to it.

Proper setup is your first crucial step

All of this is a moot point if you don't have three crucial settings enabled on your iPhone. Without any one of these, Find My iPhone will not work.

1. Settings > General > Location Services has to be on (this one is obvious, right?)
2. Under Settings > Mail, Contacts, Calendars > (Your Mobile Me account), you must set "Find My iPhone" to ON. This is not enabled by default.
3. Under Settings > Mail, Contacts, Calendars > Fetch New Data, you must either enable Push OR have fetch set to Every 15 minutes, 30 minutes, or Hourly. If you disable Push and set Fetch to "Manually" Find My iPhone will not work.

1. Quit/Relaunch Finder using the Force Quit menu
2. Open Terminal
3. Paste (or type) the following command: defaults write com.apple.Finder QLEnableXRayFolders 1
4. Relaunch Finder