Take the 2-minute tour ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

Somehow this doesn't work out of the box – is there an adapter I can buy that will allow me to connect the Displayport output of my Macbook to the Thunderbolt input of my 27" Thunderbolt monitor?

share|improve this question
4  
No - time to sell something and replace it so as to have matching protocols. –  bmike Mar 2 '12 at 23:21
4  
To elaborate, a Thunderbolt output is backwards-compatible with a DisplayPort input, but not the other way around. As @bmike said, I'm afraid you're out of luck. –  Dan J Mar 2 '12 at 23:24
2  
Apple's Tech Specs for the Thunderbolt Display clearly state it requires a Thunderbolt-enabled Mac computer, including MacBook Air, MacBook Pro, Mac mini, and iMac –  jaberg Mar 2 '12 at 23:37
    
If Thunderbolt can output (into a DP display) the correct ("old") DisplayPort protocols, why can't it receive the "old" DisplayPort protocols. –  Jonathan. Mar 3 '12 at 11:22
add comment

2 Answers

up vote 7 down vote accepted

As @bmike, @djacobson, and @jaberg have stated in comments, that will not work. There is currently (as of March 2012) no adapter, nor do I expect there to be one to adapt mini-DisplayPort to Thunderbolt. (The standards were defined to be backward-compatible, not forward-compatible.)

share|improve this answer
    
BOOOO! This sucks ;) –  Horace Loeb Mar 3 '12 at 2:17
    
The good news is that you can return it, and if not that you can sell it, its still worth a lot. Additionally apple is still selling the 27" LED Cinema Display on the Apple Store, which will work on your Mac. Also note that DELL and HP are making a really nice professional IPS panel series of 27" LCD that offer the same 2560 by 1440 resolution, and those will work with you mac as well. –  MrDaniel Mar 3 '12 at 3:08
    
I thought Thunderbolt was DisplayPort with PCIe added in? intel.com/content/dam/staging/image/Kim/…. So surely the DisplayPort protocols are the same? –  Jonathan. Mar 3 '12 at 11:19
    
@Jonathan Yes, Thunderbolt is DisplayPort multiplexed with PCIe such that a DisplayPort device will only read the DP signals. However, a Thunderbolt device would be expecting both signals and the absence of the PCIe part might cause it to think there is no signal at all. –  CajunLuke Mar 3 '12 at 18:21
    
@CajunLuke, it sounds like they could have quite easily made just DisplayPort work both ways. Someone could create an adapter which produces the PCIe and trick the display. –  Jonathan. Mar 3 '12 at 20:49
add comment

No this will not work. Check the system requirements for the Apple Thunderbolt display.

System Requirements

Thunderbolt-enabled Mac computer, including MacBook Air, MacBook Pro, Mac mini, and iMac OS X v10.6.8 or later

As of yet there is no way to add a Thunderbolt port to a Mac that did not ship with Thunderbolt.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.