Receive also an error during the change Apple TV mode. This one has to do with being unable to add gpt.
This is what I see in the console:
[diskutil, unmountDisk, /dev/disk3]
Disk /dev/disk3 unmounted
return code = 0
[gpt, add, -b, 0, -s, 0, -i, 1, -t, 5265636F-7665-11AA-AA11-00306543ECAC, /dev/disk3]
return code = 1
java.lang.Exception: gpt add failed
Anybody an idea if this is also related to the flash drive? Seems not logical to me as it is able to unmount it. Permission problem?
Any help/suggestions is highly appreciated.