オリジナル投稿者： adlerpe ,
If you've already gotten the bigger drive and an external housing, you can also do the swap the other way around: * Mount the new drive in the external case * connect the drive to the computer through USB * format the external drive using Disk Utility * clone the internal drive to the external drive using a utility like [http://bombich.com/|Carbon Copy Cloner] or [http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html|SuperDuper!] * install the now-bootable external drive into the Macbook Air and * do whatever updates make sense If your current setup has a Recovery partition, you can download a new installer from Apple and install it on an external drive. With your current drive installed, hold down the Option key before powering up your computer. Two volumes should appear: Your main drive and a Recovery partition, which is normally used to repair the main volume. A system reinstaller is one of the utilities in the Recovery partition; it will download a new installer from the App Store, and install it on the drive you choose.