Cayman Systems GatorCard E/II NuBus Ethernet EtherTalk Mac Network Card BNC AUI

Cayman Systems GatorCard E/II NuBus Ethernet EtherTalk Mac Network Card BNC AUI

The Cayman Systems GatorCard E/II is a NuBus Ethernet network card designed for Apple Macintosh computers equipped with NuBus expansion slots. It provides 10 Mbps Ethernet connectivity with support for both BNC (10BASE-2 coax) and AUI (DB15) interfaces, and supports EtherTalk to bridge Macintosh AppleTalk networking over a standard Ethernet infrastructure.

Specifications & What's Included

• Manufacturer: Cayman Systems, Inc.
• Model: GatorCard E/II
• Bus Interface: NuBus
• Network Speed: 10 Mbps Ethernet
• Connectors: BNC (10BASE-2 coaxial) and DB15 AUI on bracket
• Protocol Support: Ethernet, EtherTalk, AppleTalk over Ethernet
• Compatible Slots: NuBus (full-length card)
• Board label: Cayman Systems, Inc. / GatorCard E/II (visible in photos)
• Includes: Card only — no cables or accessories

Applications

The GatorCard E/II was designed for the Apple Macintosh II family — including the Mac II, IIx, IIcx, IIci, IIfx, and NuBus-equipped Quadra systems — dating from the late 1980s and early 1990s when NuBus was Apple's primary expansion bus architecture. Cayman Systems was a well-regarded maker of Macintosh networking products in this era, and the GatorCard line allowed Mac II-series machines to connect directly to Ethernet networks while still communicating via AppleTalk protocols through EtherTalk. The BNC connector supported 10BASE-2 thin coax networks common in office environments of that period, while the AUI port could connect to external transceivers for 10BASE-T or other media types. These cards are sought today by vintage Mac collectors and administrators maintaining legacy Macintosh II-era systems that require genuine NuBus Ethernet hardware.