Failure to power off a Tempo card before ejecting it may have an unpredictable result for OS X.
You should follow these steps:
1. Unmount any drives attached to the Tempo card by dragging them to the Eject icon in the dock.
2. Click the Card's icon in the menu bar and select "Power Off Card" from the drop down menu.
3. Push and release the Tempo card to eject.
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.