Avid has identified an incompatibility with the early 2011 17" MacBook Pro (model MC725LL/A with Thunderbolt port) when used with a Magma ExpressBox1 expansion chassis and a Pro Tools HD Native Card.
The following error message, "Unable to find an Audio Interface attached to the first HD card", is seen when launching Pro Tools HD 9 with an Apple MacBook Pro (early 2011 model) and Pro Tools HD Native hardware.
There is currently no workaround with this configuration. Avid is currently investigating this issue, and will update this article when more information is available.
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