Symptom
The SFP cable connectors are difficult to disconnect.
This happens when the Apple Fibre Channel PCI card is installed in the server's upper dual PCI slot, which is the slot that is qualified for the Apple Fibre Channel PCI card.
Solution
If the release tab is too close to the chassis to be released by hand, insert a small flat tool (such as a flat-head screwdriver) and use it to depress the tab, then remove the cable.
Additional information
The release tab on the SFP cable connector is located very close to the chassis when the Apple Fibre Channel PCI card is installed in the upper PCI slot of the dual PCI riser card. The limited space can make it difficult to press the tab on the connector to release the cable.