faqyoutom Posted July 27, 2013 Share Posted July 27, 2013 I failed to install Lion on my pc. Now I am trying to install win8 on it but it wont let me cos of the GPT so I tried to erase my disk to Ms-dos FATso i can install win on it but it stucks at Unmounting disk. I am booting from my DVD Link to comment Share on other sites More sharing options...
bigben1 Posted July 27, 2013 Share Posted July 27, 2013 if you can get into command prompt , run as an administrator, run following commands diskpart enter list disk enter you should have lists of hdds on pc as disk0 disk1 ..............check one with gpt partition(for example disk1) ;etc select disk1 enter, once gpt disk selected clean enter and thats all. if you have another windows pc , you can connect hdd to it and do as above. hth Link to comment Share on other sites More sharing options...
faqyoutom Posted July 27, 2013 Author Share Posted July 27, 2013 After it says unable to write to the last block Unfortunately all I have is my iPad nothung else right now Link to comment Share on other sites More sharing options...
joe_black Posted July 27, 2013 Share Posted July 27, 2013 Run your Lion DVD, open Terminal and enter this. sudo diskutil umount -f /Volumes/YourPartitionName Close Terminal, open Disk Utility. (Still in Lion Installer) Format it FAT, then run Windows DVD and format to NTFS/FAT. Make sure the drive is MBR for Windows DVD as well. * If that Terminal command doesn't work then try: sudo diskutil umount force /Volumes/YourPartitionName Link to comment Share on other sites More sharing options...
faqyoutom Posted July 27, 2013 Author Share Posted July 27, 2013 It says -bash: sudo: command not found bigben1 you are the biggest mother fkin BOSS!!! Thanks it {censored}in worked Link to comment Share on other sites More sharing options...
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