THis is driven by the heat problems with the G5, and production problems at IBM..
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On stage, Mr. Jobs noted that he had promised both a 3-gigahertz Macintosh as well as a more powerful PowerPC-based portable computer, promises that he had not been able to deliver.
In the end, Mr. Jobs was given no choice but to move his business to Intel, when I.B.M. executives said that without additional Apple investment they were unwilling to pursue the faster and lower-power chips he badly needs for his laptop business.
"Technical issues were secondary to the business issues," said an executive close to the I.B.M. side of the negotiations. Because the business was not profitable, I.B.M. "decided not to continue to go ahead with the product road map."