crwdns2934241:0crwdne2934241:0 Carlos Ferrari
crwdns2934249:0crwdne2934249:0:
Got here because I ran into a similar problem again (this time my drive is on MBR and I want it to be GUID - nothing was lost and no issues occurred) so I came here looking for what helped me in the past and found nothing. So to help whoever might come across this thread, this is what helped me: https://perrohunter.com/repair-a-mac-os-x-hfs-partition-table/
crwdns2915684:0crwdne2915684:0:
open