Is my 2009 magic keyboard to old to update firmware?

Just for a bit of clarification, a 2009 Apple keyboard, would be one of their Apple Wireless Keyboards, not any of their Magic Keyboards that came out in 2015.

A 2009 keyboard, would be a 2-battery, 3rd generation model. AFAIK, there are no firmware updates for it ... and, yes, it is likely too old.

As such the article you arrived here from would not be applicable for your keyboard.

i've always thought they were all called "magic keyboard'

a while ago i realized i had the 'wireless keyboard' from apple

on their website archives(?) i found a firmware 1.0 update for the 2009 aluminum keyboard

not only that, there is a 1.1 firmware update for the aluminum keyboard....maybe those aren't wireless (or magic).

finally, there is a 2.0 firmware update to the 'wireless keyboard'.

i've been having problems with connecting/reconnecting/disconnecting so i'm going to give one or all of these a try on my mid 2015 macbook pro with an old-ish wireless keyboard

another thing i've stumbled upon and then went down the rabbit hole was the possible effects of usb 3.0 ports and peripheries creating enough interference for the frequencies used for bluetooth devices

ironically, they did come out with a firmware update for the 'magic keyboard' and other magic stuff on jan 9 of this year and it is supposed to be automatic update 2.0.6

in that linked article is another link to take you to the apple site in which there is no download link so, i guess my stuff isn't magic

Apple security releases - Apple Support

scroll down and you can see all the security updates over the years staring with the most recent

Just for trivia buffs, the latest/last firmware version in the Aluminium Apple Wireless Keyboard (2007-2009) is 0.5.0

I still have one from my 2009 iMac. The iMac is long retired now but the keyboard is going well. It sees little action these days but I did fire it up just now to check the firmware version.

Thanks for providing the firmware version.