I did follow the instructions, I made the USB, then I restarted my Mac mini and I did hold the “Option” in order to boot with USB but when I click on the USB icon to boot, the system goes back to normal boot “Mac OS X Lion”.
This patch maker for macOS High Sierra does NOT work on my Mac mini 2007, A1176, Core 2 Duo 1.83GHz, 4GB Ram.