In the sample shown above the shift and command keys are being pressed.ĩ. If it does, that particular key is functioning correctly. Type the key on the keyboard that doesn’t respond and observe whether the corresponding key highlights on the Keyboard Viewer. The Keyboard Viewer shows the keyboard layout.Ĩ. Choose Show Keyboard Viewer from the Input menu in the menu bar, as shown.ħ. Make sure that 'Show Input menu in menu bar' is enabled.Ħ. Enable the input source for the keyboard layout you are testing by selecting the checkbox next to it.ĥ. Select the Keyboard & Character Viewer checkbox.Ĥ. Choose System Preferences from the Apple () menu, then choose Language & Text from the View menu (or International from the View menu in Mac OS X v10.5 or earlier).ģ. Use the Keyboard Viewer to test whether the keyboard keys are responding correctly when they are pressed.ġ. Troubleshooting wireless mouse and keyboard issues The following article provides isolation steps for the symptoms you mentioned:

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Number keys not working on keyboard