Is there a way to bring this disk to life? I have a USB disk from which the USB interface, inside the case, failed.

I removed the disk from the case and connected it to another case that is working.

Now, when I connect the disk to my Mac I see the message: this disk is unreadable.

Typing on terminal

diskutil list


gives me

/dev/disk12 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *801.6 GB   disk12
   1:                       0xEE                         375.1 GB   disk12s1


disk utility gives



is there a way to bring this disk to life in anyway or at least read its files before throwing it away?
Try to use ddrescue, which should do a block-to-block copy of your hard drive. Then mount the copy with hdiutil and you might be able to find your files.

Basically: 

ddrescue /dev/rdisk12 /path/to/save/the/copy ddrescue.log


Note: you can interrupt the process whenever you want. The progress will be saved to the map file, ddrescue.log.

And then

hdiutil attach -nomount -noverify /path/to/save/the/copy


And you should see a new disk in 'diskutil list'

You can then try to mount the partitions or do data recovery on that image. One tool you can try for data recovery is testdisk.