Hi I have a recent macbook pro 12" (bought in april 2012) model number A1278.  I'm trying to connect to a 23" apple cinema display (A1082) this currently is not working - i've bought an additional Apple MB570ZA Mini DisplayPort to DVI Adapter - no luck!

Hi I have a recent macbook pro 12" (bought in april 2012) model number A1278.  I'm trying to connect to a 23" apple cinema display (A1082) this currently is not working - i've bought an additional Apple MB570ZA Mini DisplayPort to DVI Adapter - no luck!
im not sure what to do next - can anyone help?
im running OSX 10.7.4

Hi There,
I have had the exact same issue but with a projector.
The issue lies with Mountian Lion 10.8.2.
I tried many a combination with no luck to get HDMI working.
Took my mac into the apple store and came to the conclusion it was the software, so I asked them to install 10.8 onto it (this is destructive so a backup is a must)
Bought my macbook home and voila, now displaying through my projector.
There is a small graphics update after 10.8.1 which seems to be the cause.
Hope this helps.
Thanks.

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