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iMac Late 2009 - Bluetooth and USB keyboard and mouse do not work on Big Sur installation screen · Issue #43 · barrykn/big-sur-micropatcher · GitHub
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How to Reset an Apple Wireless Bluetooth Keyboard, Mouse or Trackpad (Troubleshooting Pairing and Other Common Problems) - Dave Meehan
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Help - can't get past this screen. My wired keyboard stopped working out of nowhere after restart. : r/applehelp
![Amazon.com: Macally USB C Keyboard for Mac - Elegantly Designed for Apple Keyboard Wired with Type C - for New Gen Mac Pro/Mini, MacBook Pro/Air, iPad, iMac - 110 Scissor Keys and Amazon.com: Macally USB C Keyboard for Mac - Elegantly Designed for Apple Keyboard Wired with Type C - for New Gen Mac Pro/Mini, MacBook Pro/Air, iPad, iMac - 110 Scissor Keys and](https://m.media-amazon.com/images/I/71OjpuosVgL.jpg)