Hello everybody,
I installed Yosemite on my Dell Latitude E6420 with this guide step by step.
When I boot on my USB key and launch Yosemite from HDD, keyboard and trackpad work well.
But when I boot directly from my HDD (where yosemite is installed), keyboard and trackpad doesn't work, I have to connect an usb keyboard and usb mouse.
Could you please help me ?
Thanks in advance.