use 2009 imac as display for 2011 macbook pro
HI,
I would like to use our 2009 imac as a display for a 2011 macbook pro. I tried a thunderbolt cable first but because the imac is 2009 it didn't work. The Apple store recommended using 2 mini DisplayPort to VGA adapters connected by VGA cable. I have connected these but it doesn't work.
Can anyone suggest what the problem might be ?
Thanks
MacBook Pro (15-inch Early 2011)