In OS X, Apple’s Preview is the default application for opening a number of file types, including PDF’s. While versatile, Preview will NOT allow you to make changes to PDF’s with editable content. Fuld snerapports. Follow these instructions to set Adobe Acrobat Reader as the default application for opening PDF files. Step 1: Single click a PDF file you wish to open or any PDF file in general while holding the Control key.

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Then select GET INFO from the menu you’ve opened. Step 2: Click the drop down menu for OPEN WITH. Step 3: Select ADOBE READER from the menu. Step 4: Click on the CHANGE ALL button to keep the changes.