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Is it possible to plug a Thunderbolt cinema display into a Mini DisplayPort-equipped Mac and have it work? This question suggests that it's possible and that it's pretty much the same cable, but I don't see any explicit confirmation anywhere.

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It's not the same cable for sure - thunderbolt has a much greater bandwidth – Alex Coplan Aug 6 '11 at 0:22
Duplicate:… – Thilo Aug 6 '11 at 0:55
Ah, I didn't see that question before. Mine's a bit more specific, but it is indeed a partial duplicate. – Mr. Jefferson Aug 8 '11 at 16:02
up vote 5 down vote accepted

The short answer is no. Apple's Thunderbolt Display requires a thunderbolt signal (and only that) to operate.

The spec page for the display implies very strongly that Thunderbolt displays will only work with Thunderbolt Macs.

This happens to concern me since I own a previous-generation iMac (pre-Thunderbolt) and really wanted to have the option to use it with a Thunderbolt display. So I asked the guys at the Apple Store.

The Apple Store told me no, it will not work on a non-Thunderbolt Mac.

Sorry to be the bearer of bad news :(.

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Did they tell you if there are (or will be) adapters? – Thilo Aug 6 '11 at 5:11
I doubt it. It would not be possible to duplicate Thunderbolt with any legacy technology. You could theoretically produce an adapter that would fake out the interface, but it would be unwieldy and extremely expensive. – David H Dennis Aug 6 '11 at 5:31

Plugs are the same, cables are not. The thunderbolt cables contain chips and firmware.

I haven't used the new Thunderbolt display, however I am aware of the following:

MiniDP Macbook -> MiniDP iMac 27: works fine. Thunderbolt Macbook -> MiniDP iMac 27: works fine. MiniDP Macbook -> Thunderbolt iMac 27: does not work Thunberbolt Macbook -> Thunderbolt iMac 27: works fine.

This is in my experience and confirmed from various Apple KB articles. So I believe it's likely you won't be able to use the Thunderbolt display on a MiniDP machine, as that is certainly the case with the iMac 27" models.

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