The 8GB of memory in the introduced earlier today is permanently soldered to the motherboard and is not upgradable, of the new machine by Other World Computing. The $1,099 machine includes a 1.4GHz Dual-Core i5 processor from the MacBook Air, but users are permanently locked to 8GB of RAM. There is no build-to-order option to increase it and it cannot be increased later.The other 21.5" iMacs, launched last fall, can be upgraded through the Apple Online Store from 8GB to 16GB. RAM can also be , but it requires removal of the screen and is an extremely difficult upgrade. The current 27" iMac, on the other hand, has a easily accessed door on the rear of the machine that allows for simple RAM upgrades.
