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Check your browser's cache to recover drive space Web Browsers
Just thought I'd pass this on.. I recently was looking into where all the space on my OS X partition had gone.

I looked around and noticed that my ~/Library/Preferences/Explorer folder was around 400 MB (my cache is set to 5 MB). For some reason, the Download Cache was a 390 MB WAFF document. I trashed it, quit and restarted IE, which generated another Download Cache (only 4 KB), while keeping my download history intact.

I also checked my little brother's computer for the same thing, and he also had a relatively large file (~75 MB) there. We're both running 10.1.2, IE v 5.1.

[Editor's note: With the proliferation of browsers, cache can definitely take up a fair bit of drive space in a hurry. If you use multiple browsers, you should check each occasionally to see how much cache space they're each taking up.]
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A command-line calendar tool UNIX
With all the desktop calendars that are available, we sometimes forget the most basic and speedy little calendar app that is free in OS X.

In the Terminal, just type cal at the prompt. It will bring up a nice little calendar. Read the man pages (man cal) for other great options.
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Enable continuous music playback in iTunes2 Apps
mp3s are great for compressing your music collection, but sometimes you'd like to listen to a live CD the whole way through (e.g. Nirvana Unplugged, or some classical album). Before iTunes2, listening to consecutive songs always had annoying interruptions of silence between songs (as the computer loads the next MP3 into ram and begins decoding). Lucky for us, Apple's engineers have a solution to this problem: just use iTunes2 to set the crossfade playback to 0 seconds. You can't just turn crossfading off, you must enable crossfading, and then set the slider to 0 seconds. It works great!

To set this, select Preferences -> Effects -> Crossfade Playback, and move the slider to "0".
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Drag the dock with the shift key Desktop
I have not seen this mentioned here before:

I found that in OS 10.1 you can quickly change the position of the Dock by holding Shift while grabbing the divider line and dragging it to the left, right, or bottom edge of the screen. Hit the shift after the cursor changes into the little "resize the dock" icon and then drag!

If the dock is currently on the bottom of the screen, you'll need to shift-drag the line up and right (or left); dragging straight across won't do anything.
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Letter templates in Palm Desktop v4 Apps
In Palm Desktop v4, the instructions for creating your own "Letter Templates" (the letters you can automatically generate by clicking the appropriate button in a Contact's info screen) are somewhat erroneous if you are using OS X. While the Help file describes the location where these letters should be placed, the location doesn't exist!

Well, it does, sort of, but you have to "Show Package Contents" of the Palm application (with a control-click on the application itself). You'll then find the proper folder at "Contents -> Resources -> English.lproj -> Letter Templates".

By the way, if you are using AppleWorks, make sure your newly created letter exists as an AppleWorks word processing file and -not- as a "template"; otherwise, it won't show up in the selection box when you click the button (in Palm Desktop) to request the current contact's info be included in the letter.

Other than this little errata, Palm Desktop kicks butt!
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A few tips for importing photos into iPhoto Apps
As mentioned in this article about importing pictures into iPhoto, importing your entire collection can have some problems. However, if you import your album piecemeal, you might have better success. I had all of my photos arranged into individual folders. I imported one folder at a time and iPhoto associated each separate batch of imported files with a "roll". So, then in the organize view you can enable the view by Film Rolls option so you can see all of your photos segmented the way you originally wanted them.

A few notes:

1) Dragging a file or folder from the Finder onto iPhoto Organize view is the same using the Import menu command.

2) The time and date on the roll will be today, rather than when the pictures were actually taken. Therefore, you should import your pictures in chronological order.

3) I found a bug in the import command. Don't import pictures from a CD. Copy them to your hard drive first. Otherwise, the pictures will be copied as read-only and you won't be able to edit your pictures.
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Reverse iPhoto rotations via the keyboard Apps
Option clicking on iPhoto's Rotate button will cause the image to rotate clockwise (normal clicking results in an counter-clockwise rotation). Quicker than using the menu bar or shortcuts. This may be documented but there again I never read the documentation.

[Editor's note: The iPhoto help is actually very robust. If you select Help, then click on "More..." in the News section, you'll get a list of keyboard shortcuts, including this option-click on Rotate trick. As another example, did you know that option double-clicking a photo will open it in a separate, resizable window? There's more, too, so give the Help pages a quick read-through!]
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Use vector-based desktop pictures Desktop
The Desktop picture is not limited to just JPGs and picts - try dragging a PDF file into the desktop preference pane! The desktop will display the PDF file - and if the contents of the PDF are vector-based, it will be nicely rendered and anti-aliased.
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Install a streaming network MP3 server UNIX
Haven't seen this mentioned in many places but it deserves note. There is a nice streaming net jukebox on sourceforge called Netjuke. I installed it last week and am very impressed with its capabilities. Great for accessing a centralized MP3 collection on a LAN and even works over the internet from a remote location.

The setup involves and requires PHP and an SQL database - but I had no problems doing the setup with no knowledge of PHP or SQL. The developer is also very active and responsive.
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Reduce RAM allocation in Classic to reduce crashes Classic
If you are having Classic programs quitting on you, you might want to try reducing the the amount of memory allocated to that program.

I had problems with Photoshop, either it would quit on start up or it would quit right after that. So I played around with setting when I brought the memory back down, it was running great again. I don't think X can't handle more memory than 300,000 allocated to it.

I hope this helps.

[Editor's note: Anyone have any further info on this? How does Classic handle programs which request their own blocks of memory within Classic? I'm not too clear on this one, other than I was under the impression that Classic operated in a 1gb virtual address space. Can anyone provide any further detail on how Classic RAM allocation issues are resolved, and whether reducing RAM allocations could help with Classic application stability?]
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