Nikon generally announces compatibility information for new OS versions within 30 days of the OS release and until compatibility is announced we suggest not upgrading critical systems as we cannot guarantee operation.
Initial testing of Nikon software with Apple's new "Snow Leopard" Mac OS 10.6 indicates that there are incompatibilites with Nikon Capture NX 2, Nikon View NX and Nikon Scan, users of these applications should not upgrade their OS at this time. When more compatibility information is available it will be posted on the Nikon web site.
http://support.nikontech.com/app/ans...ail/a_id/16522