The similar issue to the Bug 56517 (see comment #0):
> Base on http://docs.gstreamer.com/display/GstSDK/Installing+on+Mac+OS+X
> The recommended system is Mac OS X Lion, So i'm not sure whether this is a
> OS: Mac OS X 10.8.2
> Python 2.7
> cerbero downloaded with "git clone"
> where i run "./cerbero-uninstalled bootstrap" the following errors appear:
> Traceback (most recent call last):
> File "/usr/local/bin/cerbero", line 8, in <module>
> load_entry_point('cerbero==0.1.0', 'console_scripts', 'cerbero')()
> line 120, in main
> py", line 378, in _find_data_dir
> raise FatalError("Data dir not found")
> cerbero.errors.FatalError: Fatal Error: Data dir not found
Problem is that Python is installed under /Library. But algorithm in the _find_data_dir method  assumes it will be installed under /usr/local. __file__ points to the config.py, which makes search for /usr/local/share/cerbero/config fruitless.
At this point we don't recommend running the installed version of cerbero which is not well supported in OS X.
Make sure you really use the uninstalled version with ./cerbero-uninstalled, it's otherwise impossible that you reach this part of the code (http://cgit.freedesktop.org/gstreamer-sdk/cerbero/tree/cerbero/config.py#n412)
(In reply to comment #1)
> At this point we don't recommend running the installed version of cerbero
> which is not well supported in OS X.
> Make sure you really use the uninstalled version with ./cerbero-uninstalled,
Yep, that what I end up doing