I have a 24" LG monitor with two different ports (HDMI and vga or something). I currently use it with my PC. But am wanting to use it with my rMBP on occasion. I tried plugging my rMBP with the PC still plugged in (via HDMI) but it wouldn't work. Only with the PC pulled out of the other port. Is there anyway they can both be plugged in together?
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