"Roaming Profiles" on Mac OSX are a significant source of errors for the 4D database. We advise against using user profiles with 4D.
A common source of errors is that 4D needs read and write rights on numerous folders. If you encounter issues, check the following folders:
Resources from the database server will be downloaded into this folder. The user currently logged in must not only have read and write access to this folder and its subfolders, but must also be the own of the folder.
This folder contains preferences and temporary data. The user currently logged in must have read and write access to this folder and its subfolders.
Program folder (Applications):
Do not install the client in the general application folder.
You should, instead, create an "Applications" folder within the user folder and add the client software to this folder, for each user. Add a shortcut to the dock or, even better, create a shortcut as .dlink file to bypass the server login.