The $999 product, which serves as a file system for storage gear, was scheduled to launch by Monday, the last day of autumn, but has been held back.
"Xsan will not ship this year; it will ship early next year," Apple said in response to an inquiry from CNET News.com. The company would not say what caused the delay.
The product is designed to further Apple's position in the high-end computing market. Xsan allows multiple computers to concurrently access terabytes worth of storage housed on Xserve RAID disks, Apple's rack-mounted storage system.
Although Apple is known for its consumer products, the Cupertino, Calif., company has built an increasing array of enterprise gear, starting with thein 2002.
Collections of Macs are used for a variety of supercomputing tasks, including notably as part of, which is among the 10 most powerful machines in the world. Apple already offers a program called Xgrid designed to cluster the computing resources of a group of Macs.
Apple, at a trade show for broadcasters. The software has been in testing mode ever since.
"Xsan is in beta testing now, and the response to it has been great," Apple said in the statement.
As recently as last month, Applethat the software would ship in the fall.