The default version of Python supported on Snow Leopard is Python 2.6. However, in some cases, it could be useful to use Python 2.5. So, how to change the default Python version in Snow Leopard? It’s easy! Open your shell and enter the following commnad:

defaults write com.apple.versioner.python Version 2.5

Instead, to set again Python 2.6 as default version, enter the following command:

defaults write com.apple.versioner.python Version 2.6

For more information enter: man python

Videos and slides related to the WWDC 2010 have been released yesterday by Apple. Developers can download videos and slides using its own Apple ID. To download the video and/or the slides of the WWDC 2010, follow this link.

Mounting an ISO image on Mac OSX does not require specific or additional software. Mac OSX, in fact, provides a tool (hdiutil) by which it is possible to manipulate disk images. For example, to mount an ISO image on Mac OSX, open your Terminal and enter the following command:

hdiutil mount /path/to/isoImage

/path/to/isoImage is the path to the ISO image to mount. After a few seconds, or better, after the checksum is completed, the mounted ISO image will appear on your Desktop and/or in Finder. For more information about hdiutil, enter the following command (in Terminal): man hdiutil.

Mac OSX’s Finder by default does not show hidden files and folders and in the OSX menu ther is no option to enable this feature. I have just published a new tutorial which shows how to enable the visualization of hidden files and folders in Mac OSX’s Finder.

Read the full tutorial…