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How to view contents of xar archived Mac OS X installer packages

            Pacifist helps if you want to inspect a downloaded package to see what it will install before installing it. Pacifist opens Mac OS X .pkg package files, .dmg disk images, and .zip, .tar, .tar.gz, .tar.bz2, and .xar archives and allows you to extract individual files and folders out of them. Pacifist can be downloaded from here or here

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