In some cases it is necessary to change which application is used for a specific file extension. If you found a found a better movie player, text editor, or image viewer you may want to use that application for all files with the same file extension.
For example, QuickTime Player is the default application for viewing MP4 movie files on OS X, but VLC could be your media player of choice.
Follow these steps to change your default preferences:
- Find a file with an extension you want to change the defaults to.
- Right click on the file to see a menu, and select “Get Info”.
(right click is a two finder click on a trackpad)
- A window appears with the file’s information, see the section called “Open with”
- It will display the current application used for this file, use the dropdown box to select you new application. If you do not see your new application in the dropdown box, use the “Other” selection to browse for it.
- Click on the “Change All” button to apply the change to all files ending with the same file extension. That’s all.
Further notes:
You can always override the default by manually opening the file in a different application with a simple right click, and “Open With” command when the default is not appropriate.
To make it easier to distinguish between file extensions you may want to also enable the option to make all file extensions visible. In Finder, select Preferences in the top menu, and click on the Advanced tab. Check the box that’s labeled “Show all file name extensions”.
Once your guest is finished, log out of the guest account with the Apple menu (top left) and select Log Out Guest. Or the keyboard shortcut Command + Shift + Q. Keep in mind that files created/downloaded by the guest user are deleted when the guest account logs out. Once the guest accounts is logged out, click on your own account, enter your password, and you’ll find everything is where you left it.
thanks alot very much wow
this information was very useful to me , thanks alot
this information was very useful to me , thanks alot
thanks
It did not work at all, one file (txt) is open with the program I selected but just that file. other files with the same extension keep opening with another program.