For setting a specific file type to always open by default with a specific application in OS X do the following:

• Right click on the file icon and choose ‘Get Info’ option.
• Choose the ‘Open With’ option and select the specific application
• Click the ‘Change all’ button.
• Smile in success

To completely reset the dock back to the original factory settings do the following:

1. Delete the files com.apple.dock.plist and com.apple.dock.db from /Users/..(your account name)../Library/Preferences.
2. Enter ‘killall Dock’ command in the terminal and press enter.

These are some screen-shots from the OS X Leopard in action on my Mac. Click each picture for a larger view.

Desktop - OS X Leopard

iTunes for music

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An article from InfoWorld, not just blatant fanboyism but an analysis supported by solid ground. Read “Why developers prefer Macs“.

Its been two weeks now since I have been using OS X and I find it an extremely stable and interactive operating system to use.

One of my gripes while using it was that in Finder window, there was no displaying of the path from the root to the current folder or file, something I find useful sometimes.

Turns out, you have to write the following command in Terminal to activate the display of the path in the top of the Finder window:

defaults write com.apple.finder _FXShowPosixPathInTitle -bool YES

Press return after typing the above line, hold down the ‘option’ key and right click on the Finder in Dock and click relaunch. To undo the change just replace the YES with NO in the above line and do the whole procedure again.

X11 for Mac OS X is an implementation of the X Window System that makes it possible to run X11-based applications in Mac OS X, for eg. Open Office or GIMP. If you are not using any of such applications in your Mac then it’s better to uninstall X11 from your Leopard installation so as to save up on the disk space. If ever you feel like installing it again then you can use your Leopard DVD to do so.

But the standard (move to trash) uninstall won’t work here, so we have to uninstall it completely using the terminal in OS X.

Write or copy & paste the following command in your terminal:

sudo rm -rf /Applications/Utilities/X11.app /private/etc/X11 /usr/X11R6 /usr/bin/open-x11 /usr/lib/X11 /Library/Receipts/X11User.pkg

That is one single line. Be very careful as a small typo can cause problems and you may have to reinstall OS X. Therefore do this at your own risk.

Apple Developer Connection has this must read article, which is for everyone who is beginning to work with Ruby on Rails on Mac OS X Leopard.