To edit MXF files in FCP, you will need to convert the video format because MXF could not be recognized by FCP. In this case, Aunsoft TrandMXF for Mac is a good choice. It could easily and quickly convert MXF/P2 MXF to ProRes mov for editing in FCP. ...
To edit Canon XF100 MXF in Sony Vegas, Aunsoft TransMXF is a good choice. It could easily and quickly convert MXF/P2 MXF files intoMPEG-2 for importing into Sony Vegas. The converted videos are in high quality and perfect video/audio sync.
I use Aunsoft TransMXF for Mac to solve MXF questions, and have used for a period of time, I think it is as good, so I want to share with you. it offers special formats ProRes 422 MOV for editting MXF videos in FCP, so I think it can help you.