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Since it sounds like your TV is very old, the problem may be that the EDID it supplies to your Mac is incompatible/incorrect. (EDID is a standard used by both DVI and HDMI that can provide information about the device's supported resolutions and refresh rates.) In the past, I've used an app called SwitchResX to work aronud similar issues, you could try ...


I've managed to get my hands on some screens now, and even though Apple representatives said it wasn't possible, it indeed is. I have now 2 (two) Dell U2515H connected and a Lenovo at the same time. On top of that, the screen on the macbook pro is actually on. The setup is as following! MiniDP (thunderbolt) --> Dell U2515 DisplayPort MiniDP (thunderbolt) ...

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