Restart mac computer press the command option p r keys until the apple logo appears.
Usb key mac.
Macally usb mini keyboard for mac and windows pc 78 scissor switch keys with 13 shortcut keys compact small keyboard that saves spaces and looks great plug and play mac keyboard white.
If there is try to remove it.
Unplug your keyboard and replug it into your mac firmly and securely.
Play pause next and previous track volume up and down mute brightness up and down sleep etc.
If your keyboard doesn t have an fn key try pressing and holding the control key when pressing a function key.
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Disconnect all connected devices from your mac.
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Press command option esc keys to close all applications that are not responding.
Some keyboards have a light that flashes briefly at startup indicating that the keyboard is recognized and ready for use.
Ensure that there is not anything debris dirt etc obstructing the connection in the usb port.
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Again formatting a drive will erase it completely so make sure you have everything backed up that you want to keep.
To format a drive on a mac you ll need the built in disk utility application.
Das keyboard has two port usb 2 0 hub you can connect usb compatible devices or charge your iphone.
Reset usb ports on mac to detect a usb drive.
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If you want to use a different file system on your usb drive you ll need to format it.
To use the standard function keys hold the fn function key when pressing a function key.
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Plug the usb which is not showing up to your mac computer.
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Switch the keyboard s cable to another usb port on the same mac if possible.
There are mac function keys included.
Then press and hold the keys as your mac starts up.
Wait a few seconds before pressing the keys to give your mac more time to recognize the keyboard as it starts up.