First select your final timeline and choose
>RT click the timeline>Choose Output>Export to File
|The next window that opens choose Options|
Choose to Export As MXF OP1a
then from the drop down choose Apple ProRes 422 quality
Uncheck use Marks and Selected tracks to make sure
the entire timeline gets exported.
But if you don't want certain tracks or only a portion of
the timeline you can put in and out points on the timeline and choose
Use Marks and Use Selected Tracks
Choose PCM, 48, 24bit and Stereo for the Audio options
Then Choose Save
Choose a place to save the file and Name it
Then Click Save
The resulting file will be a .mxf file that you can open and view
NOTE:Apple QuickTime will not open it.