I have a late 2009 21.5" iMac. It has a mini display port. Its hard drive has been formatted, and I haven't re-installed OSX yet (and don't want to if I don't have to).

I'd like to use the iMac as an external display for a windows PC that has a display port.

Before I buy a mini-display port to display port adapter... (a) Does the iMac support target display mode? I'm seeing conflicting answers (b) Does target display mode require OSX to be installed? I know its activated with command-F2, but am not sure whether that's a low-level BIOS-type thing, or a feature of OSX.

Thank you!

I have a late 2009 21.5" iMac. It has a mini display port. Its hard drive has been formatted, and I haven't re-installed OSX yet (and don't want to if I don't have to).

I'd like to use the iMac as an external display for a windows PC that has a display port.

Before I buy a mini-display port to display port adapter. How can I tell the requirements for this iMac to support target display mode?