Apple Inc. is preparing the first significant overhaul of its MacBook Pro laptop line in over four years, according to people familiar with the matter, using one of its older products to help reverse two quarters of sliding sales.

The updated notebooks will be thinner, include a touch screen strip for function keys, and will be offered with more powerful and efficient graphics processors for expert users such as video gamers, said the people, who asked not to be named.  Apple is also planning to bring over its Touch ID fingerprint technology from the iPhone to the new MacBook Pro line.

Apple has tested versions of the upcoming laptops that integrate the scanner beside the new function key display, according to one of the people. The sensor would allow users to log in more quickly and theoretically authenticate Apple Pay purchases. Like with iPhones, the new Pro laptops will encrypt fingerprint data so it can’t be removed from the devices.

Apple will also release a new version of its Mac operating system named Sierra this fall that brings Siri, new messaging and photo-management features, deeper iCloud integration, and more efficient file storage to Apple’s desktops and laptops, the company said in June.

Apple’s shares have begun to recover after tumbling to as low as $90.34 in May amid concerns of slowing iPhone sales. They are up 3.4 percent now for the year to $108.81.

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