UMax Computer Corporation, Fremont, California, said yesterday it will release a new lower-end Mac operating system machine in mid-July. UMax currently carries the SuperMac S900 machine, which Umax says gives Unix workstation class performance. The new machine, believed to be a 603-based offering, will target consumer and education markets, an area of strength for Mac cloner Power Computing Corp. But Power’s director of marketing Michael Rosenfelt said yesterday: We aren’t threatened. Our machines rock. UMax has said it will offer Mac PCs that fill in other cloner’s specification gaps, so it remains to be seen what the low-end differentiator will be.The UMax Data Systems subsidiary inheirited Mac clone technology when Radius Inc – which has a stake in the company – decided to get out of that business (CI No 2,852).