Thank you for using TechTool Deluxe and visiting Micromat’s site to stay protected by updating your software. TechTool Deluxe has been discontinued, the last supported version being Mac OS X 10.7 (Lion). Since TechTool Deluxe is a discontinued product, updaters for TechTool Deluxe are no longer available for download.
Owners of TechTool Deluxe are eligible to upgrade to the premiere Macintosh diagnostic and repair utility TechTool Pro. It includes many features that are not available in TechTool Deluxe including compatibility with OS X 10.8 (Mountain Lion), OS X 10.9 (Mavericks), OS X 10.10 (Yosemite), OS X 10.11 (El Capitan) and macOS 10.12 (Sierra) and beyond.