Attempted to install / run TechTool Pro from the above mentioned “Rescue & Install” disc but could not drag, copy etc. that file to the HD. Then attempted to run from the mounted disc and got the “No TechTool Pro prefs folder” available (present, etc.). So I created a file named accordingly and placed that in the prefs folder… still nothing, non-functional. (I always try.)
Then, cold-booted with the “Rescue & Install” disc and successfully ran TechTool Pro, just as we all once did with Norton - booting from that disc to perform checks and repairs.
So, maybe it’s not a TechTool Pro installation file at all… but perhaps a file necessary to place (along with a bootable system folder?)… on a disc to be booted and then ran? And no, I did not download the “standalone” version of TechTool 3.0.9 that you're working with, to test that. I'll post back if and when I can.
Other comments / suggestions / experience welcome here…
Addendum: Hell, I downloaded that standalone file yesterday and just now unstuffed it. Did you read and follow the “Instructions & SN” file and place those “Put These Into Their Folders” files in their respective folders?
And then… the old OS 9 "habitual-ritual" of zapping the PRAM and rebuilding the desktop before even attempting to run TechTool for the first time?
I’ll drag this file downstairs and try it out later.