MacBook – Boot Camp only detects two out of three monitors

bootcampdisplaymacbook prothunderboltthunderbolt-display

Setup: brand new MacBook Pro with Retina Display plus two 27" Thunderbolt displays. So, three displays in total, which works like a charm in OS X.

Unfortunately, when boot-camping into Windows 8.1, it detects only two of these: the one on the MacBook and the (first) external one:

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Note that interestingly, the devices plugged into the secondary external monitor still work – e.g. all three cameras are there.

Any ideas?

Best Answer

From http://support.apple.com/en-us/HT204154

  • How many Apple Thunderbolt Displays can I use with a Mac in Windows 7 or 8 with Boot Camp?
  • Most Mac computers can support one Thunderbolt display using Windows. The iMac (Retina 5K, 27-inch, Late 2014) and Mac mini (Late 2014) can support two, and the Mac Pro (Late 2013) can support up to six.
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