11.11.2 post-install problems [English]

Please check all the other HDDs or SSDs for an EFI partition.
make sure that one of the drives with the EFI partition contains the missing EFI folder and the default.plist.

is your OSX HDD connected to the first SATA Port?

@neoyoli
Try to use "EFI Mounter" to mount the EFI
bevor using Multibeast

So,

your edit in the first post says that your iMessage issue is solved but you do not find an Default.plist in any of you EFI-Partitions.
In that case all your NVRAM Settings seem to be added via Terminal, the same way you corrected the current problem.
That also means, that without the Defaults.plist all of those NVRAM Settings will be lost, if you have to do a NVRAM Reset.

The most important feature of the Defaults.plist is the ability to contain those NVRAM settings within the file.
If you have to do a NVRAM Reset, all the NVRAM Settings will be read from the file and you don't have to worry about adding entries which you might not remember...

Did you find the EFI-Partition which contain the folders /EFI/Quo and /EFI/Oz?

I've created a kind of Standard Default.plist, which contains all the necessary plist-fields but without data, just the information where you can get the stuff.
If you use the Terminal to question the current settings, like

or

you can get all the current infos from the NVRAM and paste that into the Defaults.plist file for later use.

Be careful with the section 1F8E0C02-58A9-4E34-AE22-2B63745FA101.
There are a lot of entries, which are not in the Standard_Defaults.plist, but which you should test in Terminal, to make sure you have those entries in the Defaults.plist:

If the Terminal command returns

you don't have to put the value into the Defaults.plist.

Afterwards put the file as "Defaults.plist" into the folder /EFI/Oz and you're prepared for the NVRAM Reset.

The MAC address for en0 and en1 are the same?

that doesn't make any sense.
please provide the complete output from the Terminal command "ifconfig".
just add it as a text file to your post.

if the entries in the first section of the defaults.plist are the same, don't change them.

For all the Apple Aps like iMessage, FaceTime and AppStore to run correctly you have to use the MAC address from en0, even if you don't use that interface.

you're welcome..

I can't tell you, since I don't use Multibeast for such tasks.

I prefer either to use Clover Configurator, the patched version of the older Disk Utility or the Terminal way...

Multibeast will only mount the EFI for installing the Clover Drivers, it will not do it permanently and will only do it if you will take the right disk..

Using the newest Clover Based Versions of Multibeast with an OZ Environment will not work since Multibeast relies on an installed Clover instance in your ESP. Multibeast will fail if there ere not such files on the ESP. In order to get it done with OZ simply use Pacifist and extract the needed Extensions and place them into /Efi/Oz/Darwin/Extensions/Common/ in case they have no dependencies to specific Systemfiles (AppleHDA has dependencies so it won´t work) in Case of AppleHDA use KextUtility to install it.