What is the "Previous System" folder I now have have in my root directory after upgrading Mountain Lion and is it safe to delete? It's 172MB of mostly random font files

  • which OS did you update from? I upgraded from Snow Leopard and curiously don't have that folder.
    – matt b
    Commented Jul 31, 2012 at 14:52
  • Lion ---> Mountain Lion
    – Alexander
    Commented Jul 31, 2012 at 16:55

1 Answer 1


It's safe to delete that folder. I did it and to date I haven't faced any issues.

  • Happy i could help, but i am surprised someone down-voted it!!
    – iGameRam
    Commented Jul 31, 2012 at 7:09
  • 1
    Sorry I should have posted an explanation. I downvoted because this does not really answer the core question of what the folder is... and there is also no source suggesting it's safe to delete the folder (just your own experience as anecdotal evidence).
    – jtbandes
    Commented Jul 31, 2012 at 9:16
  • @Jtbandes it depends on the perspective, i understood the concern of the asker (hopefully, since he accepted it) that is about the safety of deleting the folder and i told him about my experience ( i also do a lot of testing ). Anyways thanks for the vote :-)
    – iGameRam
    Commented Jul 31, 2012 at 9:26

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