Troubled push pioneer PointCast Inc has told partners that its products will not support Apple Computer Inc’s Macintosh platform after December 31. The company admitted that its Mac product was substandard and said that it could not afford to invest the time and development resources needed to bring it up to par. From December 1, Mac software will no longer be available for download from PointCast’s web site. Service and broadcasts will cease on December 31. PointCast has not had a good year. First it was forced to cancel a planned IPO, and then in October it saw two of its founders defect for another start-up (CI No 3,514). Ironically, PointCast’s decision to drop the Mac comes just as Apple’s internet-centric iMac consumer desktop seems to have revived that company’s fortunes.