hello members, I installed "Disk Wiper 15 Free for Mac" with USB Key Transcend JetFlash 8GB exactly as in the manual. https://www.paragon-software.com/home/dw-mac/ At the end of the installation i have always the Failed status ! (try with 2 keys) Is it "Recovery Media Builder" not compatible with El Capitan ? Where download a newer version ? Thanks. (excuse my english) Dan