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.

You’ll be able to watch popular cable television series such as HBO’s “Entourage” and AMC’s “Mad Men” on your computer by the end of the year without paying extra - as long as you’re a Comcast Corp. subscriber watching at home.

Comcast will be the first cable TV operator to unlock online access to a slate of valuable cable shows and movies, aiming to replicate what’s available on television through video on demand.

Time Warner Cable Inc. and others plan to follow as the pay-TV companies look to satisfy growing consumer appetite for online video while preserving subscription revenue.

Access will be carefully guarded: Comcast subscribers can initially watch shows and movies only on their home computers after being verified by the cable system. And for now, the online viewing will be restricted to those who also get Internet service through Comcast, not through competitors like phone companies.

Comcast, wanting to make sure the shows will remain off-limits to non-subscribers, still is working on providing access over competing home broadband systems as well as on the go - at work, on laptops and, one day, over cell phones.