How to Sync a Wireless Keyboard With a Mac
If your Mac computer is equipped with Bluetooth, you can sync a wireless keyboard to it. This process is also known as pairing. Before attempting to add any new hardware to your computer, verify that your Mac OS X operating system software is up to date. Check to see if your Mac has Bluetooth by looking for a Bluetooth icon in System Preferences. If the icon is not there, your computer does not have Bluetooth installed.
Open "System Preferences" from the "Apple" menu, then select "Bluetooth." Select both the "On" and "Discoverable" options by placing a check in the boxes.
Install the batteries in your keyboard.
Click on "Keyboard" in System Preferences, then click the "Set Up Bluetooth Keyboard" button. Your computer begins searching for a Bluetooth keyboard.
Turn on the keyboard. A LED light on your keyboard begins to blink, and your computer should recognize, or "discover," the keyboard within about 10 seconds.
Enter the eight-digit passkey as displayed in the Keyboard Preferences panel, then press "Enter."
Click "Continue." The Setup Assistant now pairs your computer to the keyboard.