"TechTool Protection Alert!
The volume "Secondary Internal" has 1% free space remaining. the Volume Usage threshold is configured in the TechTool Protection system preference."
I can't find a way to stop the error message and it's driving me up a wall. "Preference" is grayed out. To make matters worse, I downloaded an update to see if that would give me 'Preferences', but now TechTool is asking for a serial number which I can't find. It gives me two choices IF I had a serial number: Quit or OK. Where would I find the serial number?
I've tried to find the parent company online to get answers, but no joy, I can't find the address.
Any help would be gratefully received.