Just read this on creative cow, does this mean what it seems?
Re: Thunderbolt Expansion Chasis
by David Jackson on Mar 18, 2012 at 12:29:17 pm
Here's where I read it - from Magma's site in fact.....
"There is an interoperability issue with MacOS using graphics (GPU) cards externally through Thunderbolt. Unfortunately, external graphics solutions for MacOS X do not work and we do not expect a resolution from Apple in the short term."