Apologies if this has been discussed before, but has something changed in Mountain Lion in terms of using external displays ?
I've got an old Sony TFT connected to the iMac via a mini display port -> DVI cable. I'm quite sure in Lion I could just turn it on (after the iMac had booted) and the iMac would automatically recognise it as an extended display.
I'm now having to disconnect the cable at the back of the iMac every time to make it recognise the display! Grrrr.
Paul.
I've got an old Sony TFT connected to the iMac via a mini display port -> DVI cable. I'm quite sure in Lion I could just turn it on (after the iMac had booted) and the iMac would automatically recognise it as an extended display.
I'm now having to disconnect the cable at the back of the iMac every time to make it recognise the display! Grrrr.
Paul.