This is what worked for me on MAC OS 10.6.8 with Bitcoin-Qt 0.8.1-beta. I'm combining and editing the Pygmy script and Nick ODells answer, there were a few typos.

Also note, I opened the application with right-click >> "Show Package Contents" and then edited the files with the finder, and TextWrangler. No Terminal required!

1. Create new directory in Bitcoin-Qt.app/Contents/Resources and name it data

2. Navigate up a level and then open the MacOS folder

3. In that folder, create a new file called start.sh

4. open that new file in a text editor and write:

   #! /bin/sh dir1=$(cd "$(dirname "$0")"; pwd) dir=echo $dir1 | sed 's/"/\\"/g' | tr -d '\n' data="$dir/../Resources/data" "$dir"/Bitcoin-Qt -datadir="$data" note that the last line contains the name of the only other file in the MacOS folder (Bitcoin-Qt). That's important! Because that is the program that will be executed a the end of the script you just wrote. Also, that fourth line has to link to the 'data' folder we created in step #1

5. Navigate back up a level to Bitcoin-Qt.app/Contents/ and open the file called Info.plist

6. Find the lines that look like this:

   CFBundleExecutable Bitcoin-Qt

Change it to:

<key>CFBundleExecutable</key>
<string>start.sh</string>

This is what worked for me on MAC OS 10.6.8 with Bitcoin-Qt 0.8.1-beta. I'm combining and editing the Pygmy script and Nick ODells answer, there were a few typos.

Also note, I opened the application with right-click >> "Show Package Contents" and then edited the files with the finder, and TextWrangler. No Terminal required!

1. Create new directory in Bitcoin-Qt.app/Contents/Resources and name it data

2. Navigate up a level and then open the MacOS folder

3. In that folder, create a new file called start.sh

4. open that new file in a text editor and write:

   #! /bin/sh dir1=$(cd "$(dirname "$0")"; pwd) dir=echo $dir1 | sed 's/"/\\"/g' | tr -d '\n' data="$dir/../Resources/data" "$dir"/Bitcoin-Qt -datadir="$data" note that the last line contains the name of the only other file in the MacOS folder (Bitcoin-Qt). That's important! Because that is the program that will be executed a the end of the script you just wrote. Also, that fourth line has to link to the 'data' folder we created in step #1

5. Navigate back up a level to Bitcoin-Qt.app/Contents/ and open the file called Info.plist

6. Find the lines that look like this:

   CFBundleExecutable Bitcoin-Qt

Change it to:

<key>CFBundleExecutable</key>
<string>start.sh</string>