usb stick

My laptop is running El Captain currently, I couldn't update by simply downloading and installing the app in app store. And also I have restored my USB stick with the installation app, but somehow now matter what I do. The USB stick doesn't work, with a few seconds of apple on the screen it...

I have recently tried to install Mountain Lion on my computer, though I cannot boot from the USB stick containing the files. My system is: Motherboard: Abit IP35 Pro CPU: Intel Core 2 Quad Q6600 @2.4GHz Memory: 3GB DDR2 PC6400 Corsair ram Can anyone help me boot from the USB stick so I can...

I have a PNY 64Gb USB stick that I successfully installed ML on. When trying to boot from the USB Stick I get "Mach-0 file has bad magic number" and the installer never loads. I am trying to install on a Gateway MX6121 laptop. Any ideas? Thanks!