Oddbean new post about | logout
 Probably this option erased the partition. You need to format the disk with a partition with MacOS compatibility.  
 Thats what i assumed but there is not even an unknown partition being shown, damn 
 If I remember correct, if you reboot and start in recovery mode, tjere is a tool available capable to read raw disks and format with a MacOS partition. Or you can try with a Linux in a live USB.