Don't rely on it being preserved. Many repairs require Apple to replace or reformat the hard disk, which will result in the loss of your data. Please make sure you back up your data on a regular basis to minimize your data loss. Apple and its AASPs are not responsible for any damage to or loss of any applications, data, or other information stored on your MacBook Air while performing service.

The MacBook Air was the first subcompact laptop offered by Apple since the full-featured 12" PowerBook G4 was discontinued in 2006. It was also Apple's first computer with an optional solid-state drive.[14] ArsTechnica found "moderate" performance improvements of the 64 GB[note 1] solid-state drive of the first-generation Air over the standard 80 GB hard drive in tests. On October 14, 2008, new models were announced with improved capacities of 128 GB SSD and 120 GB hard drive.
4d New Nvidia Driver Third party post on driver improvements http://barefeats.com/gtx980ti.html Nvidia Blog post about driver: http://blogs.nvidia.com/blog/2015/08/31/mac-driver/ It saw massive boosts on many newer nvidia hardware, mostly stuff you'd only find in mac pros and hackintosh. However, nvidia has also enabled (for first time) this version of driver to install on imacs and macbook pros without needing to modify installer. Also, these drivers safely do NOT touch built in and out of date driver in OS X, they install along side it, with a control panel that lets you switch between the current 346 driver, and the over year old 310 drivers. You definitely want to be using the 346 driver :) The driver is for ANY nvidia GPU even if it's not listed on the driver download page. Performance gains will be seen across almost all nvidia hardware over OS X stock driver. Especially 600-700-900 series. if you use AMD based graphics don't bother with update. However, if you do have a nvidia gpu mac, you should definitely install this 10.11.6 15G20015 Driver Direct Download (Updated 06-02-18): https://images.nvidia.com/mac/pkg/346/WebDriver-346.03.15f14.pkg 10.12.4 (Updated 04-20-17) https://images.nvidia.com/mac/pkg/367/WebDriver-367.15.10.45f01.pkg (Previous driver with no pascal support but works best with Metal/WoW since 378 series driver had performance issues on 10.12.x that weren't fixed until 10.13.x 10.12.6 16G1408 (Updated 06-02-18) http://us.download.nvidia.com/Mac/Quadro_Certified/378.05.05.25f09/WebDriver-378.05.05.25f09.pkg 10.13.5 17F77 (Updated 06-02-18) https://images.nvidia.com/mac/pkg/387/WebDriver-387.10.10.10.35.106.pkgOmegal625 4d
Apple is the king of consumer laptop tech support, and the company added to its repertoire in the past year. In addition to answering questions via social media, live online chats, its support app and phone calls, the company began posting tutorials to a YouTube channel in November 2017. These options flank the company's existing Genius Bar, which still stands out as one of the few ways users can get in-person support directly from a laptop-maker.
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