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Just to clarify, are you trying to block .rtf files from opening in MS Office when you double click on them in Finder, or are you trying to block them from opening at all?<br />
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If you just want to change the default app that opens when you double click on .rtf files in finder, just right click on one such file and select Get Info. Then in the Get Info window, change &quot;Open With&quot; to some app other than MS Word and click on &quot;change all&quot;.
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Just to clarify, are you trying to block .rtf files from opening in MS Office when you double click on them in Finder, or are you trying to block them from opening at all?

If you just want to change the default app that opens when you double click on .rtf files in finder, just right click on one such file and select Get Info. Then in the Get Info window, change "Open With" to some app other than MS Word and click on "change all".

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We have a number of macs in our company and need to block the rft files from opening in office 2011. We cannot control the macs centrally.<br />
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Is there a script I can run locally on the mac to block this &nbsp;that I can give out to the users to run?
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We have a number of macs in our company and need to block the rft files from opening in office 2011. We cannot control the macs centrally.

Is there a script I can run locally on the mac to block this  that I can give out to the users to run?

Need to block RTF files from opening on OSX

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.

Mac OS X

Microsoft Word is a commercial document editing program that is part of the Microsoft Office suite. It features numerous text-editing tools for creating richly formatted documents, along with tools for the use of macros in Word documents. Word's native file formats are denoted either by a .doc or .docx file extension. Plugins permitting the Windows versions of Word to read and write formats it does not natively support, such as the OpenDocument format (ODF) are available. Word can import and display images in common bitmap formats such as JPG and GIF. It can also be used to create and display simple line-art.