Information Technology Reference
In-Depth Information
don't see an icon for Macintosh HD, choose Recovery HD instead. When the OS X Utilities application loads,
choose Utilities →Terminal to load the Terminal application. At the prompt type the following command and
then press Return:
bless -mount “Volumes/Macintosh HD” -setBoot
For versions of OS X prior to Lion, insert the OS X Install USB flash drive, and then restart. Press and hold C
until you see the Apple logo to ensure that MacBook Air boots to the flash drive. Press Return in the initial
screen to load the OS X Installer. Choose Utilities →Startup Disk and click the Macintosh HD icon. Click Re-
start and then click Restart again when the application asks you to confirm.
Your MacBook Air Says You Don't Have Enough
Memory
MacBook Air comes with 4GB of RAM (configurable to 8GB), so it's unlikely to run out of memory very of-
ten. However, it can happen — particularly if you work with large files or many programs at once. Here are
some things to try if MacBook Air is low on RAM:
Close large files.
If you have any extremely large files open, try closing them.
Close running applications.
Shut down any applications that you don't need.
One common cause for low RAM on a Mac is when you have a number of applications running that you don't know
about. How can that happen? One way is to think you've shut down an application because you closed that applica-
tion's window, but the application remains in memory. Check the Dock and look for icons of the applications that you
thought you'd closed. If you see any open apps, right-click the icon and then click Quit.
Log out.
This should help a lot because it shuts down all your open applications and documents.
Restart MacBook Air.
This is the ultimate way to clear out the RAM and get a fresh start.
Your MacBook Air Runs Slowly
All Mac users want their Macs to be as speedy as the first day they got them, but sometimes that's not the case.
If you find that MacBook Air has that molasses-in-January thing going, you can try a few things before you
start pulling your hair out in clumps.
Sudden slowdown
If the slowdown is a recent and relatively sudden phenomenon, it suggests one of the following remedies:
