Hope someone can help with this here is the scenario:
User 1 comes in opens file X and does some work, saves and closes out.
User 2 comes in, opens up file X and gets a "this file is read only" message. User 2 does work and must do a "save as" to save any changes made to file X. User 1 opens the drawing again and now receives the "this file is read only" message. Every user including the original user receives the "this file is read only" message and must use save as to save any changes. It's a work around, but its not ideal.
This is persistent across multiple users, multiple files, and multiple offices all on CAD for MAC.