An error occurred while updating the firmware time capsule
The great thing is the Airport Express offers you incredible flexibility due its portability.I know with mine I get a pretty good signal without it but with it, I can put it out on the back patio and enjoy streaming music. If you are trying to extend a wireless network that is not an Apple Airport base station it cannot be done.
In both cases, Air Port Utility will happily allow me to set up the Time Capsule and have it join my existing network.In any case Wi Fi extension is generally flaky and to be avoided.I have a Mid 2011 i Mac currently running Mac OS 10.12 Sierra.The i Mac no longer boots from the internal drive (or recognises the DVD), but still works otherwise.However, the problems don’t seem to be invove the actual I had the same issue trying to install High Sierra on my late 2011 Mac Book Pro, in which I'd replaced its mechanical HDD with an SSD.Device (Airport Express, Air Port Time Capsule, Airport Extreme) should now reappear in Air Port Utility. Solution 2: Reset Air Port Express Reset Air Port Express.If the Unexpected message reappears, reset the Air Port Express again.Because the APFS requires support of new version firmware, your mac's firmware will be updated to latest version during the installation of High Sierra if it hasn't got one.After the first restart, the installer prepares the latest version firmware which suitable for your mac model onto EFI system partition of your main disk with command.The Time Capsule can only "extend" a wireless signal....using wireless only...another Air Port Extreme, Time Capsule, or Air Port Express.Apple is doing this in a proprietary way and non Apple hardware is not supported.