Currently Being ModeratedSep 3, 2013 9:42 AM (in response to msussams)
Reboot: as soon as you hear the startup chime press (and hold) the option key. Choose OSX from the startup manager.
Currently Being ModeratedSep 3, 2013 9:44 AM (in response to Csound1)
Thanks, I tried that at first, but my keyboard wasn't even working!...
Eventually (for anyone else reading this!), plugged in another USB keyboard and it recognised that and then got into Mac os X from that!
Thanks for your time!