USB keyboard not working for login

I use a usb extented keyboard on my iMac 3.06Mhz and at startup it is not being recognized. I have to use my bluetooth keyboard to enter this question.
How or why is this a Problem. it was working fine before I made the installation of 10.9 ... but I was having intermittent problems w/ 10.8

Maybe it needs to be plugged into the Mac before it goes to sleep...
Because when it wasn't letting me type anything I tried every USB port on the Mac itself, as well as the monitors, and even using an extender. Nothing worked.
However, I did eventually leave the keyboard plugged into the Mac and it woke up without a problem this morning. So, I'm hoping your solution did the trick!
Thanks

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USB Keyboard Not Working At Login Screen

After waking my brand new Mac Pro (OS X 10.7.4) from sleep, my usb keyboard sometimes becomes unresponsive. So, at the login, I am unable to type my password in order to restore my session.
Is there a reason for usb devices to not work after waking the mac up? I tried all of the usb ports on the mac, as well as all the ports on both monitors. Thankfully, I have a bluetooth mouse and that works. But no idea why the usb devices stop working all together...
My software is completely up to date. And since this computer is less than a month out of the box, I'm puzzled as to why there would be any issues with it. Please let me know if there is a setting that affects this and what I need to do to fix it.
Thanks!

Maybe it needs to be plugged into the Mac before it goes to sleep...
Because when it wasn't letting me type anything I tried every USB port on the Mac itself, as well as the monitors, and even using an extender. Nothing worked.
However, I did eventually leave the keyboard plugged into the Mac and it woke up without a problem this morning. So, I'm hoping your solution did the trick!
Thanks

Mac Pro 2014 USB Keyboard not working for log-in.

I have a Mac Pro 2014 with two thunderbolt displays and an apple USB keyboard. Whenever I boot up the computer the keyboard doesn't seem to work at first. Often I get hung up on the log-in screen pushing keys to no effect until the bluetooth keyboard dialog comes up. Then after that sits fruitlessly looking for a non-existent keyboard for about 30sec the USB keyboard will start to work. In total I'd say this delays logging in by about a minute. During this whole time the USB mouse and Wacom tablet work. After logging in everything works fine.
Also this might be related, if the computer goes to sleep it can take several attempts to wake it up before I'll get a login screen.

Mine was also fresh out of the box. My reseller in Iceland could verify this and this was the solution. I first thought it was the Icelandic keyboard. Reported it as bug.

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Ladies and Gentleman,
I have a large problem.
I use a T430 with a port replicator.
I need to set a Boot password and a HD Password.
When I boot the T430 in the port Replicator, the usb keyboard is not recognized and I had to open the T430 to enter the password.
I tried different Bios settings, nothing helped.
It seems to me that the keyboard drivers are not loaded at that time.
Before I had a W500 and a port replicator. Worked without problems.
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Ralf

Sorry. On my T430s, the USB3 port on the left starts faster than the always-on port on the back, so I hook a port replicator to that port. Is this the Lenovo port replicator or aftermarket? (I assume you are talking about a USB port replicator and not a docking station) Is the port replicator powered by an external power supply? I always plug in the power supply to the port replicator before I start the laptop.

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hello, recently my apple usb keyboard stopped working. the usb connections on the keyboard still work but the letter buttons do not do anything anymore. is the keyboard fried or is this fixable?

I assume you tried another USB port and tried the KB on another computer. A pc will suffice for testing purposes.

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In an attempt to improve the mac's performance I performed all of the actions described in the following article: 11 Ways to Optimize your Mac's Performance ( http://lowendmac.com/eubanks/07/0312.html ). Basically, I cleaned up files and 'other' system preferences. Things seemed to be fine and the computer did run much better. However, after running Monolingual and deleting what I understood to be 'unnecessary' PowerPC files the standard USB keyboard is no longer working.
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0) Verify that the caps lock key is off. It can make inputting passwords difficult if you don't realize it is ON.
1) Reset the PRAM by restarting the system then quickly press the command-option-P-R keys before the gray screen appears. Wait until you hear the computer restarts two times as indicated by the startup chime. For more info refer to http://support.apple.com/kb/ht1379.
2) If the issue persists after the PRAM reset then boot from the Snow Leopard or iMac Install DVD, whichever you have. Once you see the menu asking you to choose a language try using the arrow keys on the keyboard to move the language choice selection. If the arrow keys are working at this point it indicates your keyboard is at least partially functional. Go ahead and select the language then proceed to step 3.
3) Once the next screen appears move the cursor up to the menu bar area and pull down the Utilities menu. Select the 'Terminal' application. Once the Terminal application launches try typing the various keys on the keyboard and check to see if the correct characters are displayed. Please let us know if you detect any errors. If there are no errors then you should be able to quit the Terminal application and proceed with reintstalling the OS.

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BR

I just did the latest update and my Apple USB keyboard stopped working. The keyboard works fine with other computers and other keyboards work with my Macbook.
The keyboard ships with a three foot extension cable. I plugged the keyboard into the Macbook with this cable and now it's working fine. I think it has something to do with the USB port being 3.0. A USB hub may also solve the issue.
JD

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[img]http://i100.photobucket.com/albums/m18/rokuez/IMG_0282.jpg[/img]

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As far as the kvm being incompatable, i thought of that, and tried plugging the keyboard directly into a usb port and got the same results.
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Hi,
I have a mechanical usb keyboard (PC) that I like to use, but it isn't working on my 2010 MBP. I did a bit of googling & a series of experiments to figure out the problem, but I am no closer to a satisfactory solution. Here are my observations:
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USB keyboard not working on startup

I have recently upgraded to a 2011 Mini Server running M. Lion. It has all worked perfectly up unitl the last few days when the keyboard (a generic non-Apple Windows one) is suddenly not working when the machine starts up. It is recognised in System Information as 'USB Multimedia Keyboard' but it says something about it not being 'registered', I think. Sorry I can't remember the exact message. I have to unplug it from the USB port and plug it back in, then it works fine again. It never stops working mid-session or after the computer wakes from sleep. I have a Logitech mouse, a Belkin hub and an M-Audio keyboard controller plugged into the other ports. The point is it has been recognised fine up til now so I wonder what has happened meanwhile and how I can fix it? It's no big deal having to unplug it and plug it back in but it is a bit of a pain. Does anyone have any idea what to do about this? Thanks.

I seem to have a similar problem. I have the Apple wireless mouse but a corded Apple extended USB keyboard connected to a USB (AC powered) hub. Upon startup, I usually log on to the iMac (running OS 10.8). However, lately when I boot up, there is a question mark next to the login field on the screen. I can move the mouse, but there is no response from the keyboard. All indicator lights on the hub are green, indicating there is a connection between the iMac and the USB devices. I eventually have to remove the power plug from the hub then insert it again to reset the connection, which fixes it. I have no problems after that.
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USB keyboard not working for login

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