How to Make a Sigma on a Mac
People use the sigma, the 18th letter in the Greek alphabet, for a variety of reasons, such as when they need to type a mathematical symbol for summation in statistics, or if they need to write the name of a college fraternity. All Macs come with Greek characters already installed, and you can easily enable Greek with the Keyboard settings in Apple's System Preferences.
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Instructions
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Click the Apple logo at the upper left of the screen. Click "System Preferences."
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Click "Keyboard," and then click the "Keyboard" tab. Click the "Show Keyboard and Character Viewer in Menu Bar" check box. An image of a small flag appears in the Mac's menu bar.
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Click "Show All," and then click "Language and Text."
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Click "Input Sources," and then click the "Greek" check box in the "Select Input Methods to Use" section. Click the check box labeled "Show Input Menu in Menu Bar."
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Click the flag icon on the menu bar at the top of the screen, and then click "Show Keyboard Viewer." The virtual keyboard appears.
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Click the flag icon, and then click "Greek" to enable Greek in the virtual keyboard.
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Launch an application that you use to type text with. For example, click "TextEdit" on the Dock of your Mac to launch Apple's native word processor. A new blank document appears.
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Click the Sigma character in the virtual keyboard to make a Sigma appear in your document. You can also press the "S" key on the Mac's keyboard to type a Sigma.
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