Download Media Player Codec Pack. The Media Player Codec Pack supports almost every compression and file type used by modern video and audio files.
To back up the currently installed Compressor application:. Create a new folder in the Applications folder, and name it after the application (for example, 'Compressor 4.2.2'). To check your version of Compressor, open the application and choose About Compressor from the Compressor menu. Select the Compressor application in the Applications folder. Choose File Compress 'Compressor.' It will take a few minutes to compress. Move the resulting 'Compressor.zip' file into the folder you created in step 1.
Move the folder containing the.zip file to a backup drive.