Managing plug-ins : Enabling the FileMaker Script Engine to use plug-ins : Changing plug-in file permissions (OS X)
 
Changing plug-in file permissions (OS X)
Note  The following information is for server administrators.
To change plug-in file permissions:
1. Start the Terminal application and use the cd command to set your path as needed.
2. Enter the following at the command line:
chmod g+rx <filepath>
or
chmod g+wrx <filepath>
The g+rx is necessary because plug-ins and system-level scripts must have the group read and executable bits enabled. Use the g+wrx form to permit write permission as well. Some plug-ins or scripts that use preferences or folders of additional files may require write permission to those files or folders.
Related topics 
Folders for server-side plug-in files
Enabling the Install Plug-In File script step to update server-side plug-ins
Enabling the FileMaker Script Engine to use plug-ins