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It takes about 90 seconds to boot and shut down my MacBook Air. I have got it this year. I have checked numerous things on the Internet but they don't help at all. What do I do?

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Ben, more info would be helpful - model of your MBA, OS X version, what you've tried already, info from log files (Console), and whether you've taken your MBA in to get checked out at an Apple Store. As it is, we don't have enough information to provide a diagnosis. – JW8 Oct 14 '12 at 23:03
It would also be helpful to add what you've tried. You mentioned you "checked numerous things on the Internet". Some more information about what those "numerous things" are will help to determine the cause of your problem. – daviesgeek Oct 14 '12 at 23:33

I agree with JWB's comment, more info on your computer and system would be helpful.

The "standard" Apple fix (when you call AppleCare) usually involves making a new user which is a useful thing to know how to do. Doing this will help you sort out where the problem is, at the system level or at the user level.

Go to the Apple menu and choose "System Preferences."

Click on "Users and Groups.

Unlock the screen to make changes (you'll need to type in your user password)

Before doing the next step click on your user name (current user) and then click the Login items tab to the right. Are there things loading on login that you don't recognize or you think might be causing the problem? If yes make note of what they are. For example, on my computer I have only two things that load on login: Fantastical and Alfred.

Hit the + (plus) under the list of users to make a new user.

Create a new standard user (make the user name and password easy). You can choose login options and set Automatic login to the new user if you want to test complete boot up speed but this isn't really necessary.

Close System Preferences.

Log out of your current user.

Log into the new user.

Shut down the computer.

Was it faster? How about on restart into the new user. Faster?

If starting up from the new user sped things up there's something loading or running at the level of your user account that's causing the problem.

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