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How to Upgrade Mac System Software

Method 1 of 3:

Upgrading Mac System Software With OS X 10.3 and Later

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    Open the Apple menu.
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    Click the Software Update option.
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    Choose the upgrades you wish to install in the Software Update menu.
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    Click Install.
    1. When using OS X 10.3, click "Check Now."
    2. Versions of Mac OS X 10.5 and later have the ability to run software update checks automatically. These checks can run in the background. When a software upgrade is available, the computer will prompt you.
Method 2 of 3:

Upgrading Mac System Software With OS X 10.2.8 and Earlier

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    Open the Apple menu.
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    Click on System Preferences.
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    Select "Software Update" from the View menu.
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    Select "Update Now."
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    Choose the items you wish to install, then click "Install."
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    Input an administrator account name and password.
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    Restart your computer if the software update calls for it.
Method 3 of 3:

Upgrading Mac System Software With a Standalone Installer

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    Open your browser.
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    Go to the Apple Support Downloads website.
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    Select the software update you wish to install.
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    Click Download.
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