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Double click the PKG icon and follow the on-screen instructions. Once the PKG has downloaded, open the folder it was downloaded to (this is usually 'Downloads' within your own Home folder). How the download actually happens is dependant on your browser and system set-up, and thus outside the scope of this article. This will start the download of the GhostScript PKG (Package Installer). Locate the 'GhostScript xx.xx' link with the highest 'xx.xx' version number - it's usually near the top of the page - and click on it. Install from the recommended source shown above and you should be fine. GhostScript is available from many other places on the web but be aware that some other installations - if you don't trust the source - may contain viruses or other malicious software (malware).

You can download the latest version of GhostScript from. If you're not installing GhostScript then skip the rest of this section and go to. If, on the other hand, you want to make sure that Scribus is ready for whatever you need to do with it then you should install GhostScript. You can always follow the instructions below if you change your mind later. If you don't think that you will need these functions - and not everyone does - then you don't need to install GhostScript but you will get a message each time you start Scribus mentioning that GhostScript isn't installed. It is also needed if you want to use the 'Print Plate' Preview functions. It also allows you to export your document as PS or EPS (rather than the normal PDF export). Specifically, for Scribus, it allows you to import PostScript (PS) images, Extended PostScript (EPS) images, and PDF files (as images). GhostScript is software that provides services to other applications. This is not a problem with Scribus, you'll get this a lot if you install Open Source Software on OS X. See this for instructions about doing this. If at any point you get a message saying something like 'Scribus.app' can’t be opened because it is from an unidentified developer.' This is Apple's way of - depending how you look at it - either protecting you from software that could be a problem, or, making it more difficult to install software that Apple hasn't approved.

As of OS X Mountain Lion (10.8) Apple introduced something called Gatekeeper.
