G3 iMac Airport Card Holder – Adapter Apple Rescue of Denver » Products Page » G3 to G5 » Networking (G3 to G5) » G3 iMac Airport Card Holder - Adapter Out of stock Make your iMac wireless! Apple AirPort Carrier Card Adapter Apple M8753G/A, 820-1066-A, 630-2938-A Airport Card Adapter. This adapter is for slot-loading G3 iMacs (400MHz or faster) only. Requires an 802.11b Airport Card (not included). Product not in stock Price: $15.00 This product has sold out. Updating...