Apple updated its entire Mac lineup on Tuesday, including its desktop iMacs, a new unibody MacBook, the Mac mini, and the newest addition to the Apple product line is a wireless, multitouch mouse.

The new iMacs -- 21.5-inch and 27-inch models -- replace the former 20-inch and 24-inch iMacs. The 21.5-inch model starts at $1,200 and features a 1920x1080 pixel display. It sports a 3.06 GHz Intel Core 2 Duo processor with 3MB shared L2 cache standard.

The 27-inch iMac starts at $1,700 and features a 2560-by-1440-pixel display, which offers 60 percent more pixels than the previous 24-inch model, according to Apple.

The low-end MacBook also remains at the $999 mark, putting an end to analysts assumptions that Apple would drop its price. The new MacBooks weighs 4.7 pounds and gains a unibody enclosure like the current aluminum MacBook Pros, except this one is plastic. It sports a 2.26-GHz Intel Core 2 Duo processor, a 13.3-inch LED backlit glossy widescreen display and a multitouch trackpad.

The Mac Mini received a minor update for the holiday season in two configurations: a $600 model with a 2.26 GHz Intel Core 2 Duo processor, 2GB of 1066 Mhz RAM and a 160 GB hard drive. A $800 model has a 2.56 GHz Intel Core 2 Duo processor, 4GB of RAM, and a 320GB drive. Both use Nvidia GeForce 9400 graphic chipsets.

The company also added a new addition to its product line with the Mighty Mouse, dubbed the Magic Mouse. Apple reckons the wireless device is the first-ever multitouch mouse on the market.

Swiping is the primary use for two-finger multi-touch: for example browsing pages in Safari or in iPhoto. The Magic Mouse supports screen zoom, 360 degree scrolling, and one and two-button clicks. The Magic Mouse is included with all iMac desktops. The Magic Mouse is $69 when purchased separately.