Apple has introduced an US$999 21.5-inch iMac for authorized education purchasers. It’s not available at the online education store — at least not yet.

The education only model is less expensive than the $1,200, 21.5-inch iMac offered to all consumers. For example, it only comes with 2GB of memory (compared to a 4GB minimum for all other shipping Macs). However, the memory can be upgraded to 8GM.

The education iMac has a 250GB (7200 RPM) hard drive and an AMD Radeon HD 6750M graphics processor with 256MB of GDDR5 memory. This compares to a 500GB hard drive and a AMD Radeon HD 6750M graphics processor with 512MB of GDDR5 memory on the $1,200 model.

As for processing power, the education iMac sports a a 3.1GHz Intel Core i3 dual-core processor compared to a 2.6GHz quad-core Intel processor o the $1,200 model. It also lacks a Thunderbolt port.