[Mike Hunt]

Hate to bring this up again but you can't un install pro tools first, there is not un installer and if you had it on your computer and try to install over it you will get errors like this;
An error occurred installing Shoe Tool. Try running a build with signed components first to get it installed properly.

You install pro tools first on your computer and for some reason needed to grab files from a back up (ex.Time Machine) you will need to erase the drive and re install the OS according to apple when I asked them...complain to Apple if you don't like it