1.0.b13 not working under Snow Leopard

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What steps will reproduce the problem?
1. d/l latest version
2. run installer
3.

What is the expected output? What do you see instead?
GetMasterBlock: Error 13 opening /dev/rdisk1s2
mount_hfs: Permission denied
  install_recovery failed
Failed! 

What version of the product are you using? On what operating system?
I've tried installing on 4 diff USB drives as well as an SD card. Same results 
every time. One of the drives had a previous atvusb creator install on it.

Please provide any additional information below.

Original issue reported on code.google.com by pet...@gmail.com on 7 Aug 2012 at 8:23

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NOT Snow Leopard!!!!!!!! Mountain Lion, OS X 10.8.

Original comment by pet...@gmail.com on 7 Aug 2012 at 9:42

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Same here!

Original comment by stone...@gmail.com on 11 Aug 2012 at 2:49

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same here

Original comment by JustinRS...@gmail.com on 25 Aug 2012 at 5:12

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Comment 6 by petar.kr...@philips.com, Aug 2, 2012
open terminal >> type" sudo -s" >> enter your user password>> now go to the atv 
creator app in finder and right click on it and select show package 
contents>>contents|macOS| and drag the atvcreator package to the terminal and 
hit enter. now it will launch and should work it did for me anyways

from: http://code.google.com/p/atvusb-creator/issues/detail?id=628

Original comment by JustinRS...@gmail.com on 25 Aug 2012 at 5:20

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[deleted comment]

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#4 worked for me too - under osx 9.0

Original comment by bruner...@gmail.com on 13 Nov 2013 at 8:13