This is Samsung memory and is the same memory which Apple sells. This memory is in stock and can ship today.
1GB DDR2-533, PC2-4200 DDR2 DIMM.
The MA240G-A carries a MemoryTen lifetime exchange or repair warranty against manufacturing defects. It may also be returned in original condition within 14 days of delivery for full credit minus shipping. We also supply unlimited lifetime tech support for this item.
Compatible with Apple 1.9GHz 17-inch iMac G5 (MA063L/A), 2.1GHz 20-inch iMac (MA064LL/A).