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.
Best Answer
Based on your hard labor so far :) and that the problem is not the cable.....it is time to try the:
1) Restart the computer in Safe Mode with display attached (shut down and restart while holding down shift key).
The display will show up without distortion.
2) Change the display to desired preferences (dimensions and refresh rate).
3) Restart computer.
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Since you mentioned the messages during the download, lets consider following.
From Apple:
This could occur when a self-powered Thunderbolt device (other than a directly-connected Thunderbolt display) is connected to a Thunderbolt port while installing the update.
To resolve this issue: