Apple decline to outfit a Mac with willingly accessible eSATA ports. The corporation appears to believe that FireWire and USB are sufficient for outside devices. OWC says there’s sufficient client insist for eSATA and they're stepping up. OWC publicize an eSATA upgrade for the new 27-inch iMac. except it’s not an upgrade you can do manually. You’ll have to send your iMac to OWC so they can install the eSATA kit. OWC says they can do the installation and ship the iMac back to you in 48 hours or less.

When you acquire your iMac back, you’ll discover a solitary eSATA port to the right of the RAM slots. (In the commentary part of OWC's blog entry regarding the eSATA improve, an OWC representative says that “limitations inside the case” avoid OWC from placing the eSATA port anywhere else.) You can then connect eSATA-equipped storage devices using your own eSATA cable or an OWC Flexible eSATA cable that is included with the service.