An alternative solution, that I personally prefer, is to:
Assumptions:
Solution 1:
- Open a new console window or console tab.
Navigate inside your project folder by typing:
cd /Users/username/projects/example/
Open the current folder as Textmate project with file explorer by typing:
mate .
Solution 2:
- Open a new console window or console tab.
Open your project within Textmate with file explorer by typing:
mate /Users/username/projects/example/
Explanation
The 'mate' command starts up your Textmate editor from the command line. You can pass a path argument to the 'mate' command, which does not have to be a file, but can also be a folder. Once you pass in a folder as an argument, Textmate will open up in project mode and therefore displays a file browser window.