If Like me you want to use MusicBrainz Picard metadata tagger, and are running Mac OS X, you'll probably encounter ticket 3532, which displays this nice little message box :
which says : "Error opening library: dlopen(libdiscid.0.dylib, 6): image not found ".
Now if you read the ticket you'll see that the issue is fixed but that a new version of Picard as not been released yet. Fixing the issue is easy.
First you need to have the developer tools installed , which you can download from connect.apple.com. Once they are installed do the following in a Terminal window "
curl -O http://users.musicbrainz.org/~matt/libdiscid-0.2.2.tar.gz
tar zxvf libdiscid-0.2.2.tar.gz
cd libdiscid-0.2.2
./configure
make
sudo make install
After the sudo command you will be prompted for a password - enter your password.
This will fix the issue, you'll need to start restart Picard - but picard was probably already closed when you started doing this.
On a side note if you are running a PowerPC machine (G4/G5 based macs) the musicbrainz folks are looking for feedback on the PPC build of picard.
Thank you! I've been looking for a solution to this for a long time.