Internal SSD can't install Bigsur with opencore

[maclode1950]

Hello,

Weird, I installed Bigsur (Opencore) on external harddrive, it's working great.
I tried to installed on my internal SSD and It does not seem to work properly ... I can format it, but no EFI can be mounted ... maybe a parameters with Opencore ?

Thanks

 

[antieatingactivist]

Hello,

Weird, I installed Bigsur (Opencore) on external harddrive, it's working great.
I tried to installed on my internal SSD and It does not seem to work properly ... I can format it, but no EFI can be mounted ... maybe a parameters with Opencore ?

Thanks

Is the drive set to a GUID partition map?

 

[maclode1950]

Is the drive set to a GUID partition map?

Yes it is.
That's weird, I tried a carbon copy from ma harddrive to my SSD, it copied but it seems to stop at the end.
btw the EFI can't be mount from this drive 'SSD'