Thanks for your reply. I have been to busy at work to find the time to look into this, but i really need and would appreciate some help with this issue.
I am able to boot from an older backup on another disk. At first, my SSD appeared to be corrupt, but DiskWarrior was able the correct som errors, and I can now see the folders and files on the SSD-disk.
CHANGE: Clover can see the disk now, and I can boot from it, but half-way thru the boot, the boot halts and the machine shuts down.
Is it just graphics? Start without NVIDIA driver?
So: How do I get from booting from my backup-disk to booting from the SSD again?
EDIT: I tried to boot in Verbose mode and get a glimpse of a message saying that the disk is unmounted and that the system is shutting down. How do I get to view a boot log?
Also: When I get to the Clover boot menu, I cant figure out how to start without the NVIDIA drivers...
PS! Just received another SSD in the mail, so I will follow the advice given below, and keep an exact copy at all times
I think uninterrupted rebooting is an important part of OS X update.
I agree with you 100% about that silly Christmas theme.
This was my first Clover EFI boot and I had to learn a lot before be able to change it.
Perhaps it was there intentionally to encourage us to study Clover?
Joke aside, if you can still access your HDD nothing is lost.
If you do not have a backup of your personal data, it is a good time to make one.
I think you could then try to rename your OS X partition using terminal with the following command line.
/usr/sbin/diskutil rename oldname newname
and re-install Clover bootloader to this renamed petition.
While I cannot guarantee this will work, it might worse a try before reinstalling everything.
This is my 4th hackintosh.
My first hack was Snow Leopard and learned it a hard way about the peril of update.
My strategy is to make a good backup using Clonezilla (I am also a Linux/Windows user).
Whenever the update comes, I make a disk image with Clonezilla and create a exact clone of the current working system on the second SSD. I then run a update on this cloned SSD leaving the original SSD intact, just in case the things got wrong.