I have a Macbook Pro 17-inch Early-2011 model. It is running 10.7.5 and no matter what I do, it does not want to output to an extra display using Thunderbolt (and a Mini Display port to VGA adapter).
Is there anything I can do for my Macbook to detect the extra display? I have tested with a fairly old Fujitsu LCD and a brand new LG one. None of them are detected in Displays.
I have tried:
- activating display in Clamshell mode by sleeping (closing lid) and waking MBP up with external keyboard -> NOTHING
- download GFXStatus and switching to discrete mode -> NOTHING
- tried booting into Clamshell mode -> NOTHING
- downloaded all available firmware updates and software updates for Thunderbolt, every time being reminded that I either need 10.8 installed or an earlier version of Lion (10.7.4).
Your help is appreciated.