Macos 沙盒模式下iTunesTrack位置为零？

我正在沙盒一个osx应用程序，它使用脚本桥访问iTunes

        for(iTunesFileTrack* track in fileTracks)
        { 


           //url is nill in sandbox mode but good value in non sandbox mode
            NSURL* url = [track location];

            NSString* sourceFile = [[track location] path];

            if(sourceFile == nil)
            {
                NSLog(@"Sourcefile for the track %@ was nil", track);
                continue;
            }
         }

如果返回nil，我将使用以下权利

            <?xml version="1.0" encoding="UTF-8"?>
            <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
            <plist version="1.0">
            <dict>
                <key>com.apple.security.app-sandbox</key>
                <true/>
                <key>com.apple.security.assets.movies.read-write</key>
                <true/>
                <key>com.apple.security.assets.music.read-write</key>
                <true/>
                <key>com.apple.security.network.client</key>
                <true/>
                <key>com.apple.security.network.server</key>
                <true/>
                <key>com.apple.security.scripting-targets</key>
                <dict>
                    <key>com.apple.iTunes</key>
                    <array>
                        <string>com.apple.iTunes.device</string>
                        <string>com.apple.iTunes.library.read</string>
                        <string>com.apple.iTunes.library.read-write</string>
                        <string>com.apple.iTunes.playback</string>
                        <string>com.apple.iTunes.podcast</string>
                        <string>com.apple.iTunes.user-interface</string>
                    </array>
                </dict>
                <key>com.apple.security.temporary-exception.apple-events:before:10.8</key>
                <array>
                    <string>com.apple.itunes</string>
                </array>
            </dict>
            </plist>

它在10.7中运行良好，位置返回正常，但在10.8和10.9中，由于脚本目标权限处于活动状态，我可以迭代库，但轨迹的位置为零，这是为什么？如果我只是使用临时异常并删除part:before10.8，那么它就可以工作了

---

但是，由于苹果公司建议我们在10.8+版本中使用脚本目标，而不是临时例外授权，所以我使用的是推荐的。非常感谢您的帮助。

我通过为iTunes添加一个临时例外来解决这个问题，如中所示

com.apple.security.temporary-exception.apple-events
com.apple.iTunes

Please vote的可能重复项以重复项结束问题，而不是重复Stack Overflow上其他帖子的答案。

  iTunes[1592]: AppleEvents/sandbox: Returning errAEPrivilegeError/-10004 and denying dispatch of event core/getd from process 'TestiTunesAccess'/0x0-0x4d04d, pid=1789, because it is not entitled to send an AppleEvent to this process.

<key>com.apple.security.temporary-exception.apple-events</key>
<array>
  <string>com.apple.iTunes</string>
</array>