Are you trying to import the HD MXF videos shot with your DSLR camcorder to FCP X? If so, you must be extremely disappointed to see the mxf files being grey and cannot be imported. I have just encountered the same problem.
I shot many mxf videos with my Canon XF300 and wanted to edit them on FCP X, but the problem is that FCP X refused to import them. I turned to Yahoo Answer and found Aunsoft Video Converter for Mac,it helps me convert MXF files from Canon XF300 to Apple ProRes easily.
Following I would like to share the quick steps of Transcode Canon XF300 MXF to Apple ProRes for Editing on FCP X.
Step 1: Import MXF files from Canon XF300 to Aunsoft Video Converter for Mac
Run Aunsoft Video Converter for Mac as the best converter to transcode Canon XF300 videos to Apple ProRes 422.Cick the “Add” button to import mxf files from Canon XF300 to Aunsoft Video Converter for Mac.
Step 2: Choose Apple ProRes for FCP X
After the movies are loaded, click the “format” button and choose their export format “Apple ProRes 422(HQ) (*mov)”. Click “Browse” to specify the output destination.
Step 3: Convert mxf videos of Canon XF300 to Apple ProRes 422 (HQ) for FCP X.
After setting the output format and destination, click the “Convert” button under the preview window and conversion from Canon XF300 mxf files to Apple ProRes 422 (HQ) starts immediately. It will complete in a few minutes.
Then you can enjoy your time editing HD ProRes movies on FCP X.