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What would interfere with changing the default application for opening files on OS X?

What would interfere with changing the default application for opening files on OS X?

I know how to change the default application for opening files. I select a file in Finder, right-click and select Get Info from the context menu. In the file's Info window, expand the Open with: panel. In that panel is a combo box that says, in my case, Adobe Flash CS4. I click the combo box and select Flash Player. It changes. Then I click the Change All... button. A dialog pops up and says:

Asked by: Guest | Views: 66
Total answers/comments: 1
Guest [Entry]

"Michael,

This has been bugging me for months, too. I think it's a bug in OS X.

It seem that if you change the default application then try to ""Change All"", OS X forgets that you just changed it, and sets it back to the original.

Instead, do this:

Get Info
Select new default application
DON'T click ""Change All""
Close info window
Do Get Info again
Click ""Change All""
Click ""Confirm""

I'd be interested to hear if this works for anybody else. Our corporate voicemail system converts voicemails to .wav files and e-mails them to me, but when I double click to listen it opens iTunes and saves the voicemail in my music library!! So frustrating!! The trick above finally seems to have solved this problem."