The Echo ExpressCard/34 Thunderbolt adapter requires Mac OS 10.6.8 or later and supports cards with Thunderbolt technology-aware drivers. Download and install the latest driver to make your card compatible:
Note: Sonnet FireWire 800 Pro ExpressCard/34, and FireWire/USB ExpressCard/34 cards are compatible without additional drivers. For third-party products listed as compatible, please visit those manufacturer's Websites to get the latest, Thunderbolt technology-aware drivers.
Your computer may not be fully supported by the Qio BIOS. If you boot with SxS cards inserted into the Qio, it forces allocation of the busses and memory space needed. Some computers will refuse to allocated bus space for later insertion unless two SxS cards are inserted before booting.
If you are having hot plug issues, not basic SxS functionality, you can use CFScan utility to force the Qio to "see" a newly inserted device.