How do I permanently Safari's Develop User Agent Default option to IE?

Hi Guys,
I need my Mac users to be able to run Safari in IE mode all the time.
This is a requirement for a new system of mandatory use, so please let's not get into the discussion of the why do I need to do this, and let's get down to business on the how do I do it.

I was reading that I need to change the following configuration file

Problem is that this file isn't there.
I go to the folder above and I see a whole bunch of "*" files but none of them is the safari file.

Where can I find this file?
How do I permanently Safari's Develop User Agent Default option to IE?

Thanking you in advance,
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cargexConnect With a Mentor Author Commented:
To whom it may concern:
I found this command does the trick:

defaults write CustomUserAgent "\"Mozilla/5.0 (Windows NT 6.3; Win64, x64; Trident/7.0; rv:11.0) like Gecko\""
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and not



The Tilde (~) signifies the users home folder.  i.e.

~  means /users/username
If the user hasn't started Safari, the file won't exist yet.  Placing the file in ~/Library/Preferences/ sets it for the local user.  If you're logging in as yourself, then ~ expands to your home folder, not the user account folder that you want to place the setting in.

You can create a setting in your own account, then copy the file to other user accounts and change the ownership and permissions.  To specify the user's folder, you use ~username for their home forlder.  (eg.   ~username/Library/Preferences/, ~cargex/Library/Preferences/,  ~serialband/Library/Preferences/ )

You can also place the file in /Library/Preferences/ to make it a systemwide default setting for any user that logs in.  Just create the setting you want, copy it to /Library/Preferences/, then make sure the file has the read permissions for all users.
cargexAuthor Commented:
Where can I find this file.
I have looked here

I think Serialband is right if I can find one of these files I can copy the file and make it work for all the users system wide.
The question is:
Where is this file???
cargexAuthor Commented:
Unfortunately none of the comments where conclusive.
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