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e7899003 | 1 years ago (raw) | root | parent | reply | flag 
 @f1ee7a25 

Try a live Linux session from a USB key and do an analysis from there?

I'm sure you can work what is going on with the disk and partitioning in a live sess.
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Giles Booth | 1 years ago (raw) | root | parent | reply | flag 
 @fcdb09df The issues feel very Mac-specific to me, I'm not sure even if I could boot it to Linux it would help. Disks all need to be in Mac format.
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5a642803 | 1 years ago (raw) | root | parent | reply | flag 
 @f1ee7a25 @fcdb09df Do you have a spare external drive? You can boot it from a good copy of MacOS that was prepared on another machine.
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Giles Booth | 1 years ago (raw) | root | parent | reply | flag 
 @eb057e21 Good thought, I'll see if I can find a spare external disk drive and see if I can install the OS to that, reboot off it and use that to prepare a new install on the internal drive