osx - The 'Open with' option is automatically changed with my app when my app is installed -

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i developing desktop application organizes , plays movie files. so, have added mp4, mov, avi, m4v (mp4, mov, avi, m4v extensions) document type under properties of application target. problem when user installs app in applications folder of system, default option opening mp4 movie file changes voila quicktime player automatically. default option nothing 'open with' option provided in info window of file. happens of users. why happening? how solve this?

the answer found here: http://markmail.org/message/kf7lxgpu52nn34k2


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