We have managed to replicate this on one machine, but not on several others. We are continuing to investigate, but our current thought is that this is some strange permissions problem.
Can you please try the following and see if this helps?
Make sure the IDE is not running. Then open up a Filer window onto your Applications folder.
Now right click on the "MCUXpressoIDE_10.3.0_2200" directory and select the "Get Info" option.
Open up the "Sharing and Permissions:" entry in the info dialog, and use the "+" button to give the account you are logged in with Read & Write permission.
Then use the wheel drop down and select the "Apply to enclosed items ..." option

Now close the "Get info" dialog, and restart the IDE again.
Do you now see the FreeRTOS menu?
Regards,
MCUXpresso IDE Support