I recently got a Macbook Pro which is running OSX 10.6 and is the first MAC I have used as my primary computer. Setting it up has been like setting up the first computer I ever setup since I am used to setting up computers running Windows or Linux. Anyhow it has been a great learning experience so look out for a lot more articles related to OSX and Macbooks in the near future. Anyhow the below steps will assist you changing the default application that opens text files from TextEdit or TextEdit.app to TextMate or TextMate.app.
I recently updated iTunes and QuickTime on my Windows 7 PC and afterwards noticed that when opening a .PSD (Photoshop Document) file that instead of opening in Photoshop the file opened in PictureViewer. I wasn’t even familiar with PictureViewer at first however after a little searching I realized that PictureViewer is now installed with QuickTime by default which is really annoying since I already have dozens of picture viewing applications. Anyhow what it meant was that I needed to modify how file types associated to applications which is what is described in more detail. I will first describe how to change a single file type to match a single application and then I will describe how to associate a single program to many file types at the same time.