Existing users, 
Stay away from this awful app - it is DANGEROUS to your computer.
Run version 4.6.1 on a G5 duo 2.3gig with Leopard. I just pressed the 'go' button to check my hardware. To my surprise (and near panic) my second internal HD would not mount afterwards. I could still see it with Disk Utilities but it would neither repair nor mount it. Nothing would work. I had to run Diskwarrior and repair the damage that this pos Techtools did.
This app is a hazard. Do not use this. You have been warned.
TechTool Pro
hardware/software diagnostic tool
Version: 4.6.2
DO NOT USE THIS PIECE OF JUNK - IT WILL WRECK YOUR MAC
Feedback Type: Review
Contributed by: mxracinguy Wednesday, January 23 2008 @ 12:00 AM PST
Product Platform: MacOSX
Used Product For: Less than a month
Overall Rating:
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DO NOT USE THIS PIECE OF JUNK - IT WILL WRECK YOUR MAC - dudemanla
You may have had the catalog damage b4 your ran the Hardware text and that just was the final straw.Reply to This
Friday, January 25 2008 @ 12:00 AM PST