Apple Inc rolled out a new line of redesigned Mac computers on Tuesday, hoping to build up sales momentum for its biggest business heading into the all-important holiday season.

Sporting new features such as touch-based mice and edge-to- edge glass, Apple hopes to sustain the fast-growing sales of its computers. Allaying initial worries about its premium pricing, Apple’s Mac business has been surging despite a recession that has pinched consumer spending.

Mac unit sales — the largest single contributor to Apple’s revenue — leaped 17 percent in the quarter, far outpacing the PC market. That helped Apple blow by Wall Street forecasts on quarterly earnings and revenue. Its shares rose 5 percent to $198.99 in afternoon trading on the Nasdaq.