1: Set the Default Application for a Specific File in Mac OS X. This provides file-specific control over default applications, meaning you can have a document or two that open in one app, while the overall general file type defaults to open in another application.
El Capitan 10.11.6 keeps changing the default application to open some file types, even though in the Get Info dialog I had it set to open these with a different application: 'Open with: xxxxxxx (default) Use this application to open all documents like this one; Change All...'
This has happened repeatedly when I double-click on a file, so that I must select the file and go back to the Get Info dialog to change it back to what I had previously set the default app to be. Thus far, this has happened with files designated to open with at least three different applications I had set for those file formats: Photoshop CS6 (TIFF, PSD), Preview (PDF), and TextEdit (RTF, RTFD). Mac OS sometimes wants to open these with Illustrator or Acrobat or some other application instead.
Mac mini, iOS 10, 16 GB RAM
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