Apple Wireless Keyboard on iMac 20

Good morning everybody, two months ago i have installed an apple wireless keyboard model M9270T/A (not aluminium), model with numeric pad.
It runs properly since yesterday, when it stops to run.
I have tried to reinstall, it is discovered, but it doesn't linked and the led continue to lamp. So the system tells me that this bluetooth configuration is not supported by this Os X (but until yesterday it runs properly!?!?)
I have:
1) replaced the batteries
2) followed strictly what reported on support (turn off the keyboard, follo guidelines, update the latest version of software)...
No way...does anyone can help me?
Thanks in advance

Did you manage to get around your issue without resorting to a wired keyboard? My brother has the same issue.

Similar Messages

Apple Wireless Keyboard won't pair with iMac...

I just bought a new 27" iMac and had customized and shipped from Apple (didn't buy it off the shelf in the Apple Store).
When the new iMac got here today, I connected it to my aftermarket (wired USB) keyboard and trackball. It works fine.
My problem is that I need to use my old iMac for several days while I get files off of it, etc. (don't want to use migration assistant). My old iMac is last year's 24" model.
When I start my old iMac, it comes on and brings up a "Bluetooth Setup Assistant" window and starts automatically searching for a bluetooth keyboard. I read the instructions online, and powered-on the Apple Wireless Keyboard that came with my new iMac. I powered on this new keyboard, and my old iMac starts to recognize it (it says "Attempting to connect to keyboard"), but then says there has been an error, and doesn't recognize it.
The instructions online say that when I power on my Apple Wireless Keyboard, the green light on it should start blinking. It doesn't. It just comes on for about three seconds and goes off.
What's wrong? I need to get my old iMac to recognize this keyboard. I can't even safely shut if off if it doesn't. Could it be that it was already paired to the iMac it came with? I've replaced the batteries, and still it doesn't work. Please help!
Thanks!

Well, of course that had occurred to me. But I need to use both computers at once for a while, and I only have one wired, USB keyboard.
Anyway, I eventually got it to work. I still don't know what the problem was.

Connect multiple 2 apple wireless keyboards to one imac computer

How to connect several apple wireless keyboards to one imac? Ive got 2 apple keyboards that I want keep and use in different rooms (have more screens connected there). I manage to connect my logitech edge keyboard and mouse in addition to the already connected apple magic mouse and apple wireless keyboard. But it does not seem as if the imac will accept another apple wireless keyboard?

Hello Steve:
I have not had a similar problem so I am fishing a bit. I think the problem is rooted in what I thought in my previous post.
Now, how to fix it?
Try this:
Go to system preferences>bluetooth. Delete any KB entries there. Trash a preference file (com.apple.bluetooth.plist). Be sure that on and discoverable are checked in the BT preference pane. Restart your computer.
Hopefully, whatever KB you have turned on will be "discovered."
Barry
.

HT3986 Does anyone know how to enable the "Delete" key for logging on the Windows 7 partition on the latest iMac, via the latest Apple wireless keyboard? Many Thanks

Hi All
Does anyone know how to enable the "Delete" key for logging on the Windows 7 partition on the latest iMac, via the latest Apple wireless keyboard - the standard wired apple keyboard works fine via this key but not the new wireless keyboard?
Many Thanks

Holy crap, this fixes the issue. At least temporarily it has. I should add that my issue was single finger forward/back swipe stopped working on the magic mouse in Firefox since Mavericks came along. I have been fighting this since I upgraded to Mavericks a few months ago. Thank you, tbirdvet. You have no idea how much easier you just made using my iMac again.
Message was edited by: wadems

Why my Apple Wireless Keyboard (2007) wont pair with my Imac mid 2011 (MacOS 10.7.4)?

Hi there and thanks in advance for the support.
Now we have an apple wireless keyboard 2007 and an Imac mid 2011 with Mac OS X 10.7.4 that won't connect. We had the keyboard the IMac brought but now it's lost and we need to get our old wireless keyboard to work with it.
It's discoverable (we know this because it blinks and appears on the devices list on the BT setup assistant) but it wont pair or even give us the "enter the passcode" to try. We tried the "do not use a passcode with this device" and then the following comes out "the pairing attempt was unsuccessful. This configuration of Mac OS X and Bluetooth software could be invalid or unsupported."
What can we do? It sounds like you guys in apple development didn't create this connecting option. Is it true?
Buying a new one is no option nor for our pockets neither our moral. Please let us know about solutions.
Gracias

Might be corrupted Bluetooth preferences ...
Open the Finder. From the Finder menu bar click Go > Go to Folder
Type or copy and paste the following:
/Library/Preferences/com.apple.Bluetooth.plist
Click Go then move the com.apple.Bluetooth.plist file to the Trash
Make sure the keyboard has fresh batteries then try pairing the keyboard.
If that didn't help, update your Mac's software to v10.7.5. Open System Preferences > Software Update > Check Now
Restart your Mac after the updates are installed, then try pairing again.

Windows 7 Blue Screen of Death from Apple Wireless Keyboard?

I've installed Windows 7 with Boot Camp 3.0 drivers on my Mac mini, and I suppose overall, I'm enjoying it. However, I'm getting a blue screen that seems almost random. Keyword is almost.
I've got my Apple Wireless Keyboard and Mighty Mouse paired, and they're both working well, however, I do believe I am getting some blue screens from my wireless keyboard.
It seems, at random intervals (usually when I haven't touched the keyboard and mouse for awhile) I get an IRQL blue screen and no information about what's exactly causing it. For example, if I'm sitting in the other room listening to music for awhile, and I come back and press the "next" media button on my keyboard, it'll crash and give me the blue screen. However, I've also tried pressing another random button (shift) to "wake" the keyboard if it had fallen asleep, which also results in a blue screen. The blue screens ONLY show up when I give input via the wireless keyboard. Or, if I leave the computer on overnight to download a file or something, the screen will sleep (which it should) then I'll press a button on the keyboard, the screen will stay asleep, and the computer will restart. Which is just a hidden blue screen I'm assuming.
I've tried reinstalling Windows (Clean/fresh install of course), installing/uninstalling drivers, pairing and re-pairing. I've also removed unnecessary/non-Windows 7 drivers that were installed with Boot Camp.
Outside of this blue screen, I am quite impressed with Windows 7. I just can't figure out what's going on. Is there any place I can get a description of what's causing this crash? Does anyone know what's happening or know a solution to this?
Thanks in advance, if you need more details, please ask.

Experiencing exactly the same symptoms, bugcheck/bluescreen only when touching the Apple wireless keyboard after a period of inactivity.
I have an 20" iMac, just upgraded Leopard -> Snow Leopard latest minor version and updated to Boot Camp 3.1 hoping they provided a fix, but the driver at fault (keymagic.sys) doesn't look updated and the issue is still there
Hopefully someone from Apple dev support is reading this, here's all the info I could squeeze from the crash dump:
=============================================
* Bugcheck Analysis *
IRQLNOT_LESS_OREQUAL (a)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high. This is usually
caused by drivers using improper addresses.
If a kernel debugger is available get the stack backtrace.
Arguments:
Arg1: fffff80002e33440, memory referenced
Arg2: 0000000000000002, IRQL
Arg3: 0000000000000008, bitfield :
bit 0 : value 0 = read operation, 1 = write operation
bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status)
Arg4: fffff80002e33440, address which referenced memory
Debugging Details:
READ_ADDRESS: fffff80002e33440
CURRENT_IRQL: 2
FAULTING_IP:
nt!IoIsWdmVersionAvailable+0
fffff800`02e33440 80f906 cmp cl,6
CUSTOMERCRASHCOUNT: 1
DEFAULTBUCKETID: VISTADRIVERFAULT
BUGCHECK_STR: 0xA
PROCESS_NAME: System
TRAP_FRAME: fffff88002f2f0c0 -- (.trap 0xfffff88002f2f0c0)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=fffff88002f2f100 rbx=0000000000000000 rcx=0000000000000006
rdx=0000000000000000 rsi=0000000000000000 rdi=0000000000000000
rip=fffff80002e33440 rsp=fffff88002f2f258 rbp=fffff88002f2f2b0
r8=fffff80002a4f000 r9=0000000000000000 r10=fffffa80027f3010
r11=fffff88002f2f208 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0 nv up ei pl zr na po nc
nt!IoIsWdmVersionAvailable:
fffff800`02e33440 80f906 cmp cl,6
Resetting default scope
LASTCONTROLTRANSFER: from fffff80002ac0469 to fffff80002ac0f00
FAILEDINSTRUCTIONADDRESS:
nt!IoIsWdmVersionAvailable+0
fffff800`02e33440 80f906 cmp cl,6
STACK_TEXT:
fffff880`02f2ef78 fffff800`02ac0469 : 00000000`0000000a fffff800`02e33440 00000000`00000002 00000000`00000008 : nt!KeBugCheckEx
fffff880`02f2ef80 fffff800`02abf0e0 : 00000000`00000000 fffffa80`03375d90 00000000`00000000 00000000`00000000 : nt!KiBugCheckDispatch+0x69
fffff880`02f2f0c0 fffff800`02e33440 : fffff880`04a02e5d fffffa80`02a3add0 fffffa80`027e8b40 fffffa80`02a3add0 : nt!KiPageFault+0x260
fffff880`02f2f258 fffff880`04a02e5d : fffffa80`02a3add0 fffffa80`027e8b40 fffffa80`02a3add0 0000057f`fd5c5228 : nt!IoIsWdmVersionAvailable
fffff880`02f2f260 fffffa80`02a3add0 : fffffa80`027e8b40 fffffa80`02a3add0 0000057f`fd5c5228 fffff880`04a02dfc : KeyMagic+0x2e5d
fffff880`02f2f268 fffffa80`027e8b40 : fffffa80`02a3add0 0000057f`fd5c5228 fffff880`04a02dfc fffff880`00e5a2a7 : 0xfffffa80`02a3add0
fffff880`02f2f270 fffffa80`02a3add0 : 0000057f`fd5c5228 fffff880`04a02dfc fffff880`00e5a2a7 fffffa80`02a3add0 : 0xfffffa80`027e8b40
fffff880`02f2f278 0000057f`fd5c5228 : fffff880`04a02dfc fffff880`00e5a2a7 fffffa80`02a3add0 00000000`00000000 : 0xfffffa80`02a3add0
fffff880`02f2f280 fffff880`04a02dfc : fffff880`00e5a2a7 fffffa80`02a3add0 00000000`00000000 fffffa80`027fd9d0 : 0x57f`fd5c5228
fffff880`02f2f288 fffff880`00e5a2a7 : fffffa80`02a3add0 00000000`00000000 fffffa80`027fd9d0 00000000`00000010 : KeyMagic+0x2dfc
fffff880`02f2f290 fffff880`00e30c9b : fffffa80`027fd9d0 fffffa80`027fd9d0 fffffa80`027fd9e0 fffffa80`027fdc01 : Wdf01000!FxRequestBase::CompleteSubmitted+0x1f3
fffff880`02f2f310 fffff880`00e30dc4 : 00000000`00000002 fffff880`04bbcff7 00000000`00000000 fffff880`04bbcff7 : Wdf01000!FxIoTarget::RequestCompletionRoutine+0x1cb
fffff880`02f2f380 fffff800`02aab935 : 0d780da4`0da40dd4 fffff880`02f2f420 0d440d78`0d780da4 fffff880`04bbeb52 : Wdf01000!FxIoTarget::_RequestCompletionRoutine+0x3c
fffff880`02f2f3b0 fffff800`02ac3516 : fffffa80`027e8f2b 00000000`00000000 fffffa80`027fdc70 fffffa80`027e8b40 : nt!IopUnloadSafeCompletion+0x55
fffff880`02f2f3e0 fffff880`04b62323 : fffffa80`027e8b40 00000000`00000000 fffffa80`02655c10 00000000`00000000 : nt!IopfCompleteRequest+0x3a6
fffff880`02f2f4c0 fffff880`04ba24be : fffff880`02f2f590 fffffa80`027e8b40 00000000`00000000 fffffa80`0294f600 : bthport!BthCompleteRequestEx+0x5b
fffff880`02f2f4f0 fffff880`04b9c8d4 : 00000000`00000000 00000000`00000001 fffffa80`02a50c40 fffff880`02f2f6e0 : bthport!L2Cap_CompleteReadIrpList+0xc2
fffff880`02f2f540 fffff880`04b70732 : fffffa80`03349530 fffffa80`0294f5f0 fffff880`00410001 00000005`00000002 : bthport!L2CapInt_ProcessReadBip+0x430
fffff880`02f2f6d0 fffff880`04b70078 : fffffa80`0267f230 00000000`00000000 fffffa80`029b5402 fffffa80`02670000 : bthport!HCI_ProcessAclReadBip+0x642
fffff880`02f2f7a0 fffff880`04b988d9 : fffffa80`0267f230 fffffa80`03036702 fffffa80`026c0ab0 00000000`00000000 : bthport!HCI_ProcessAclRead+0x214
fffff880`02f2f810 fffff880`04b66201 : 00000000`00000000 00000000`00000000 00000000`00000056 fffffa80`026c0ab0 : bthport!HCI_ProcessMpBip+0x61
fffff880`02f2f880 fffff880`04b4d327 : fffffa80`0294f4f0 fffffa80`026c0ab0 00000000`00000000 fffff800`02ac59fa : bthport!BTHPORT_RecvMpBip+0x41
fffff880`02f2f8d0 fffff880`04b5399f : 00000000`00000000 fffffa80`00cd3910 fffff880`04b56388 fffffa80`00cda820 : BTHUSB!BthUsb_ReadTransferComplete+0xf7
fffff880`02f2f930 fffff880`04b53c31 : 00000000`00000003 fffff880`02f2f9f0 fffffa80`00ca2d00 fffffa80`00000012 : BTHUSB!UsbWrapWorkRoutine+0x17b
fffff880`02f2f9b0 fffff800`02ac3516 : fffffa80`00cd3bdb 00000000`00000000 00000000`00000000 00000000`00000000 : BTHUSB!UsbWrapInterruptReadComplete+0x1dd
fffff880`02f2fa40 fffff880`044135d9 : fffffa80`01e81050 fffffa80`00cda700 00000000`00000000 00000000`00000000 : nt!IopfCompleteRequest+0x3a6
fffff880`02f2fb20 fffff880`04413ab7 : fffffa80`028ef502 fffffa80`00cd3910 00000000`ffffffff fffffa80`01e81ea8 : USBPORT!USBPORTCoreiCompleteDoneTransfer+0xa15
fffff880`02f2fc00 fffff880`0441164f : fffffa80`01e81ea8 fffffa80`01e811a0 fffffa80`01e82040 00000000`00000000 : USBPORT!USBPORTCoreiIrpCsqCompleteDoneTransfer+0x3a7
fffff880`02f2fc60 fffff880`04402f89 : fffffa80`01e81050 00000000`00000000 fffffa80`01e81e02 fffffa80`01e81ea8 : USBPORT!USBPORTCore_UsbIocDpcWorker+0xf3
fffff880`02f2fca0 fffff800`02acc5dc : fffff880`02f07180 fffffa80`01e81ea8 fffffa80`01e81ec0 00000000`00000000 : USBPORT!USBPORTXdpcWorker+0x1d9
fffff880`02f2fcd0 fffff800`02ac96fa : fffff880`02f07180 fffff880`02f11f40 00000000`00000000 fffff880`04402db0 : nt!KiRetireDpcList+0x1bc
fffff880`02f2fd80 00000000`00000000 : fffff880`02f30000 fffff880`02f2a000 fffff880`02f2fd40 00000000`00000000 : nt!KiIdleLoop+0x5a
STACK_COMMAND: kb
FOLLOWUP_IP:
KeyMagic+2e5d
fffff880`04a02e5d ?? ???
SYMBOLSTACKINDEX: 4
SYMBOL_NAME: KeyMagic+2e5d
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: KeyMagic
IMAGE_NAME: KeyMagic.sys
DEBUGFLR_IMAGETIMESTAMP: 49c160ec
FAILUREBUCKETID: X640xA_CODE_AV_BAD_IPKeyMagic+2e5d
BUCKET_ID: X640xA_CODE_AV_BAD_IPKeyMagic+2e5d
Followup: MachineOwner
---------

Boot camp side wont recognize apple wireless keyboard

I have a base 2013 imac 21.5 inch.
Had windows partition for a couple months now. Suddenly it doesnt reeckognize my apple wireless keyboard. Mac side reckognzes it but windows doesnt.

After browsing some Windows fora, I went to look at the Log On tab of the Bluetooth Support Service Properties (Services page in the Computer Management utility). The hypothesis was that that service was being denied access to some resource. I ended up just fiddling, but to my amazement it fixed the problem.
Here's the essence of my fiddling:
+ I tried stopping and restarting the service logging on as a Local System account - no luck.
+ Then I tried with my Administrator account - no luck.
+ So I wanted to restore the original account - "NT Authority\SYSTEM" - but woe unto me, I didn't know the password! (apparently no one does for this super-account.) But if you leave the password fields empty, the service starts - oof!
And now, all of a sudden, my keyboard has started working.
So I would suggest that in a similar situation, one should:
+ stop the Bluetooth Support Service,
+ make sure the log-on account is NT Authority\SYSTEM,
+ clear the password fields, and
+ restart the service.
May the Force be with you.

HT2452 just got a replacement wireless keyboard for imac but comp doesn't recognize it and won't connect. can't type or use it. any suggestions?

Just got a relpacement wireless keyboard for my imac but the computer won't recognize it and b/c i can't use the keyboard (type) there's little troubleshooting i can do. how do i reconnect this? thanks!

You may need a wired keyboard to carry out some of these steps. It's a good idea to keep a cheap wired keyboard and mouse or trackball as backups for a desktop Mac anyway, because Bluetooth isn't completely reliable.
Step 1
Follow the instructions in these support articles:
How to set up your Apple Wireless Keyboard
Apple Wireless Keyboard: Difficulty during pairing process
Step 2
The keyboard should pair automatically when you reboot. You may have to press and hold the power button on the right side of an Apple keyboard until the LED starts flashing.
Step 3
Reset the System Management Controller.
Step 4
Back up all data.
Triple-click anywhere in the line below on this page to select it:
/Library/Preferences/com.apple.Bluetooth.plist
Right-click or control-click the line and select
Services ▹ Reveal
from the contextual menu.* A folder should open with an item selected. Move the selected item to the Trash. You may be prompted for your administrator login password. Reboot.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combinationcommand-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar, paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.
Step 5
See these support articles:
Bluetooth keyboard may not pair during Setup Assistant
Wi-Fi and Bluetooth: Potential sources of wireless interference
Bluetooth: Unreliable wireless performance may occur when USB 3.0 external devices are close
Step 6
Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

How to disable "special" f-key function on Apple Wireless Keyboard in Windows 7

Hi. I dual-boot my iMac using an Apple Wireless Keyboard. In Mac OS's "Keyboard" system preference pane, I've chosen to treat the F-keys as actual F-keys, and not the "special" function keys, such as volume control and screen brightness. This however does not carry over to the Windows environment.
I cannot find an option to do this on the Windows 7 side. I've tried SharpKeys (popular Windows freeware key-mapping registry editor), however the program doesn't recognize the key being pushed (unless I hold the "Fn" key, at which point, it sees it as the F# key).
To reiterate, I'd like to know how to use the F1 through F12 keys as F1-F12 in Windows 7, without having to use the "Fn" key.

Hi alexia416,
If you would like to use your Apple keyboard in Boot Camp with the standard function keys as the default, you may find the following article helpful:
Boot Camp: Use the function keys on an Apple keyboard
For other keyboard-related Boot Camp issues, this article is also useful:
Boot Camp: About keyboards and key assignment for Microsoft Windows - Apple Support
Regards,
- Brenden

Connecting an Apple wireless keyboard to iPad mini

I have an Apple wireless keyboard which I use with my MacMini and have tried to get it to work on my new iPad Mini (it is love at first sight, that is me and the iPad mini) but with no sucess. This maybe down to me but perhaps the keyboard can only work with one machine. Any thoughts out there?

If its paired and in range of the iMac it will auto connect to it. You may need to unpair it form the Mac mini before pairing with the iPad, or make sure the Mac Mini is off or out of range when you initate the pairing with the iPad.

Apple wireless keyboard, no battery logo always blinking

Hello,
I just got my battery changed for my apple wireless keyboard. Even if i replace the battery again, the issue start again.
The not battery logo is always blinking every 5 seconds which is terribly disturbing.
What could be the issue about it ?
Thx for your reply.
PS : i use windows 7

I don't know about the Wireless Keyboard, but Apple's Magic Trackpad (MT) is amazingly inaccurate in telling the computer how much power is left. I have a mid 2010 iMac (27", 3.6 GHz i5, 10.10.1). About a week ago, my the iMac reported that the MT had a low battery. Usually, I tend to change the battery when this happens. This time, I decided to just keep on going. Well, it's been more than a week now, and the MT is working fine. The battery charge has been gradually dropping (sort of), and now reads 8%. One day it even went to 40%, but then it dropped back to 9. I don't think this has anything to do with Yosemite, since I had been noticing that the battery life on my MT seemed awfully short, lasting less than 2 weeks on Apple's rechargeable batteries. This has been the case from 10.6 through 10.10.

I have Mac Pro 2007, which have no bluetooth hardware. What should I do to use Apple wireless keyboard and magic mouse??? Can 'third party's internal bluetooth card' be used for this purpose? Help please...

I have Mac Pro 2007, which have no bluetooth hardware. What should I do to use Apple wireless keyboard and magic mouse??? Can 'third party's internal bluetooth card' be used for this purpose? Help me please...

You can find the Apple Bluetooth card on eBay for as little ten dollars (says its for the 2008 model Mac Pro, not sure about the 2007).
http://www.ebay.com/itm/Bluetooth-Board-iMac-and-Mac-Pro-922-8233-922-8233-/1208 49278570
Here is a link to a full explanation of the card and how to install it. Part numbers may differ a bit as that is an old article and newer models have come out.
http://www.xlr8yourmac.com/systems/Mac_Pro/Bluetooth_MacPro_install/Bluetooth_Ma cPro_install.html
Just make sure that the part will work in your model Mac Pro. To that end, you may be better off avoiding eBay and going to a parts reseller. There are even third party cards that use the internal Apple bluetooth slot.
http://fastmac.com/bluetooth.php
In theory, using a USB or PCI card will work at login so long as it is recognized by Apples drivers. You say you need to launch an application to use your current USB Bluetooth dongle? If it is not controlled by the Bluetooth icon in the menu bar then it must be using a third party driver of some sort. Unfortunately, I don't know off hand which USB and PCI cards are supported.

Logitech mouse started to lag after connecting Apple Wireless Keyboard

Hi,
I'm using Logitech Anywhere MX mouse with Logitech unifiying reciever on my iMac and everything was working perfectly fine until I have
recently bought an Apple Wireless Keyboard. For some reason after connecting the keyboard to my iMac my mouse started to lag.
I'm not sure how this is connected to each other as keyboard is bluetooth and mouse is wifi but at this stage I wish that my cable keyboard
would never broke.
My whole Mac OS X software is up to date and so are the Logitech drivers (Control Center). Is any of the users expriencing such issues ?
Any advices ?
Regards,
Jakub

Thank you for your reply, I have repaired the device but it didn't helped, but switching USB ports seems to do the work, although not sure why Anyways - thank you very much!

HT3964 Apple Wireless Keyboard & Magic Mouse Not Working

i've been using Apple Wireless Keyboard and Magic Mouse on the iMac since Sep 2009 and they both worked well until one month ago, after cleaning the wireless keyboard, some of the function keys on the top row didn't work anymore while the magic mouse couldn't scroll left/right. it's really frustrating. how can i resolve this problem?

Hi Frank:
The battery reading anomaly is a known problem (began with OS X 10.6.7) and has been reported to Apple through channels. As an aside, I use the mighty monitor widget which seems to give correct readings.
Barry

My Apple wireless keyboard won't connect to my Mac mini any more.

My Apple wireless keyboard won't connect to my Mac mini any more. Going through the Bluetooth Setup Assistant doesn't help - the computer finds the keyboard, but when I type in the pass code it fails to pair with it. The green LED on the bottom of the keyboard flashes twice at roughly two-second intervals. I've tried replacing the batteries and this has had no effect. I have all the latest software updates installed.

Welcome Cheirhandrea!
There are easily hundreds of variants of the iMac dating back to 1998. Many of the pre-2006 iMacs this forum covers cannot support an Apple wireles keyboard. Because this model has been in production for so long, it is important for you to let us know as much about your computer as possible so someone won't give you information that may not be appropriate to your iMac variant.
So we need to know:
1) Your processor type and Mac OSX version, both available by doing "About this Mac" from your Apple menu at the left end of the menu bar:
2) The make and model of the keyboard.
I asked for your Mac OS version because "iOS" as currently shown in your equipment profile cannot run on any Mac computer, only Apple's mobile devices. Once you get the OS version from "About this Mac," please change your profile to avoid further confusion and get help faster without the delay of someone having to ask for clarification before they can start helping.

Apple Wireless Keyboard on iMac 20

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