On 12/13/05 9:35 AM, Paul Moortgat wrote: > I used 1.1.4 Paul, If you go to Drive 10's page at micromat.com, there's a big blue box on the Drive 10 page that says, in bold type: "Not for use with Tiger. Use TechTool Pro instead." Clicking that box takes you to TechTool Pro 4 instead. Assuming you backed up your data first, you might need to reformat the drive. But, assuming this is a registered copy of Drive 10, you could call Micromat Tech Support to find out whether there is any other way to extricate yourself from this predicament. peace, Linda