Wireless Keyboard not working. I have a desktop IMAC.
wireless keyboard isn't working. I have changed batteries. Tried another wireless keyboard. Nothing. When I turn it on it blinks and then nothing?
iMac 27″, macOS 10.13
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It is always sensible to have a spare wired keyboard and wired mouse as backup when using their wireless counterparts. If the wireless keyboard has an on/off switch toggle that on and off before booting the Mac.
Take the batteries out, and replace, just in case you inserted them incorrectly. If you have a stronger bluetooth signal than your Mac nearby, it may jam your Mac recognizing your wireless keyboard.