Suddenly my wired Apple Keyboard isn't working anymore. My MacBook don't recognize the external keyboard, and the keyboard is only two weeks old.
Is the Keyboard physically broken, or is it a software issue?
What can I do to fix it?
I resolved my issue by following the SMC Reset instructions here.
Basically unplug everything, power down the mac, hold the power button for 5 seconds. Once the system has rebooted then reattached all peripherals. Then my keyboard started working again.
This is what solved it for me:
Eventually I found this thread on the Apple website, and followed the rather bizarre advice of adding a USB extension cable between the keyboard and the Mac (luckily the keyboard comes packaged with one). Bingo! Keyboard fine, mouse plugged into it also fine.
I think the problem is that the keyboard draws so little current that it won´t wake the port if you have the Apple keyboard with a usb hub.
Just stick a usb memorystick in the keyboard and re-insert the cable. If it works then just remove the memorystick or what ever you put in (doesn´t matter what).
Since February 2015, I've had this happen to me twice. Mac refusing to recognize wired keyboard (new mac keyboard received at Xmas). Holding down power button 5 sec after rebooting works for me, but this should be happening at all! Disabled Bluetooth, removed all connections as well
I have a usb hub attached to the kyboard, and the keyboard plugged directly into my imac. I tried adding a usb extension cable between the keyboard and imac, but the usb hub light kept blinking and the keyboard wouldn't work. I removed the extension cable. Now the usb hub light didn't even blink. I unplugged and replugged the keyboard a few times, and on one of the atempts it started working again. No idea exactly what's going on. wiggling the usb connections doesn't work, so it doesn't seem to be a loose connection -- the connector actually has to be unplugged for a few seconds and then plugged back in for it to work.
I had a similar problem. Brand new iMac that refused to detect my wired keyboard.
After a lot of experimenting, I resolved the problem by removing my bluetooth keyboard from the bluetooth devices list completely and then plugging in the wired keyboard.
xthat appears, to remove it from the list completely.
On my iMac the wired keyboard quit working—I checked the USB ports, which all worked. I tried the keyboard on my MacBook, which worked. Then I read this blog. The restart didn't work but as a last resort I tried the USB extension and to my surprise, the keyboard works again.
I just had this on a box-fresh macbook pro. Sigh. This was the only thing that worked for me:
To reset the SMC:
Actually, using the USB extension lead is all that works now. Reproducibly weird.
Just tried adding a usb memory stick fix, and it worked. I can't believe I am having to do this, why can't apple recognise that it is a problem.
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