If you are considering upgrading your Macintosh to OS X 10.6 (Snow Leopard) and currently run PASW (SPSS) Statistics 17 or earlier, SPSS Inc. has stated that only version 18 of PASW Statistics will run on OS X 10.6. No version of PASW or SPSS that is currently available for Macintoshes at UVM will run on Snow Leopard. We are awaiting the arrival of PASW Statistics 18 and will make it available for download on the UVM software archive when it is received.