hi,
this may be to a permission issue in the preferences folder.
Try the following instructions and tell me if this works.
Open the Finder, locate this folder:
<Mac>/Library/<instrument_name>/
Do a right-click onto, or [Cmd]+I, then select "Get Info".
Change the rights to "Read & Write" for every user on the machine.
Apply the changes by clicking on the gear icon: "Apply to enclosed items"
Kevin