Unfortunately the reference used for a file inserted via Mac is likely different from the text inserted via windows. The data used to reference the file even differs depending on the insert method used. Insert File does not insert the same data as Insert Picture.
If interested, you can define a calulation field that returns text and place the field name of the container field as the sole term in the field's calculation expression. You can then place fhis field next to the container field sized to be at least three text rows tall and you'll see what the text inside the container field looks like and how it differs between the two operating systems.
To get an effective cross platform method for accessing these files, you can use a web viewer or a calculation field that has "Container" as it's return type, but which calculates the file reference appropriate to the current user's operating system.