NOTE - IF YOU HAVE LtRt or Stereo Mix Audio Tracks

YOU MUST MAKE SURE YOUR AUDIO IS IMPORTED INTO AVID CORRECTLY FOR A STEREO MIX OUTPUT

see this link for workflow:

AVID – Import Sound Mix LtRt

Or please check Pans on tracks and make sure they are panned Left and Right for a stereo output

Next go to >File>Output>Export to File

Click on Options

a. Choose Export As MOV, Use Marks, Use Enabled Tracks

b. Check the Video box, Source Raster should match Project Raster

c. If not already selected, select Image Preset: HD 1920x1080

d. Frame Rate should match Project (23.976p)

 e. Output Color Space should be in Rec.709 for our screening deliverables.  Keep Video Levels set to Legal Range (see below for more info)

f. Compression:

Codec Family = Apple ProRes

Compression = Apple ProRes 422

Color Depth = 10 bit

g. Check the Audio box, Format should be PCM, Stereo, 48 kHz, 24bit

Click Save to save the settings

Click on Save and will be prompted to select a place to save the quicktime. 
Then click Save and the export will start.