How to Show File Extensions on Mac OSX 10.10 Yosemite

How to show and hide file extension on Mac.

Accessed via:

  • Finder...Preferences...Advanced

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Be the First to Share


    • Assistive Tech Contest

      Assistive Tech Contest
    • Reuse Contest

      Reuse Contest
    • Made with Math Contest

      Made with Math Contest