3 ms·

I had the worst time getting Target Display Mode to function sanely. I had thought that it was some kind of hidden systems feature or something, but at least at

I had the worst time getting Target Display Mode to function sanely. I had thought that it was some kind of hidden systems feature or something, but at least at the time it required an Apple keyboard be attached and a specific key sequence be pressed during startup to make it happen.

leetrout 12y ago
On my mid 2011 iMac ⌘ + F2 enables target display mode once something is plugged in to the mini display port. Nothing needed at startup. Not sure about having to be an Apple keyboard- probably works with any keyboard as long as you know which key is mapped to command. (Usually the "OS" key).