Apple MacBook Air

To reduce the computer's size and weight, Apple omitted certain features long standard on laptops. It is Apple's first notebook since the PowerBook 2400c without a built-in removable media drive. Users may purchase an external USB SuperDrive, or use bundled Remote Disc software to access the optical drive of another computer. It is the first subcompact laptop offered by Apple since the full-featured 12" PowerBook G4 was discontinued in 2006. The MacBook Air can wirelessly access the optical drive of another Mac or Windows PC that has the Remote Disc program installed, allowing the installation of applications from a CD or DVD. It can also reinstall the system software from the included installation DVD. 

serviceability

Unlike the rest of the MacBook family, the MacBook Air has no directly user-replaceable parts. Its hard drive, memory, and battery are enclosed within the casing, with memory soldered directly to the motherboard. The MacBook Air's battery is not easily replaceable, as part of the out-of-warranty service, Apple offers to replace the battery for a fee. It may be possible for the end user to replace the battery, though it is unclear whether this process would void the notebook's warranty. 

Concerns about overheating and CPU-lockup

Several MacBook Air users since the release of the first-generation product have complained of problems with severe overheating, causing CPU lockup. This effect appears to be exacerbated in warmer climates, such as northern Australia. A software update released by Apple in early March attempted to fix the problem but had mixed results. The problem seems to appear during system-intensive tasks such as video playback, video chatting, or playing games.

Criticism

The MacBook Air has been criticized for its high price compared to other notebooks of similar or better specification, with Engadget suggesting that a premium is being paid for its form factor. The MacBook Air has also been criticized for the difficulty in accessing the headphone and USB port. Because of tight clearance, some devices, including some headphone jacks and 3G USB cellular modems will not fit, requiring users to purchase either a powered USB hub or an extension cable in order to use their devices.