I can’t try it right now but it seams that you can download a package of codecs for Pro Apps directly on apple’s website.
About ProApps QuickTime Codecs
This update adds the following video codecs for use by QuickTime-based applications:
Apple Intermediate Codec
Apple ProRes
AVC-Intra
DVCPRO HD
HDV
XDCAM HD / EX / HD422
MPEG IMX
Uncompressed 4:2:2
This update is recommended for all users of Final Cut Pro X, Motion 5, or Compressor 4.
Here’s the link : https://support.apple.com/kb/DL1396
Can somebody try it and say if it’s working ?
Edouard JOLY