AVID - How to export a timeline as a MXF OP1a .mxf file

First select your final timeline and choose

>RT click the timeline>Choose Output>Export to File

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