jweisbin 2 Report post Posted September 12, 2018 Just updated from Retro 15.1 to 15.5, on Mac Pro running OS X 10.10. Retro won't backup to a new blank, erased tape - says it's part of a backup set. Tried erasing a few times, tried restart, etc. Still no go. How do I fix this? Share this post Link to post Share on other sites