Installation issue MBA 2011

[mdmolier]

when installing the following window appears and nothing is happening. First time I waited about 15 min. before quitting and restarting my MBA. I fixed disk permissions as I read a similar issue in an older thread.

Second attempt I let run for an hour without result. Can anyone help me? Here the window that appears.

[dokterdok]

@mdmolier you need to press a key to Continue. However there's a known issue with tool : it doesn't detect the space key. It should work with any alphanumeric key or the Enter key however.

[timdtz]

I got the screen in post #1 above, then inserted my GMYLE dongle (http://www.amazon.de/gp/product/B00F85ZPIY?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00)
nothing happend. After pressing a key I got the following error on my MacBook Pro (13", End 2011, on OS X 10.10.1)