Piper Jaffray said that over the next two years Apple will grow its market share ahead of expectations thanks to greater-than-expected adoption of iPods, which will translate into increased Mac sales. The research firm also said that iTunes “will emerge as a psychological catalyst for shares of Apple in 2005,” and that strong iPod and iMac demand will lead to a strong fiscal first quarter ending in December. In addition, Piper Jaffray said that Apple is currently seeing strong portable sales. The firm said that for the fiscal fourth quarter ending this month, 40% of resellers surveyed said PowerBook sales are “tracking above plan,” while 30% said iBooks are selling better than expected.