What is a .OO3TEMPLATE File And How To Open It – The Omni Group (Guide)

Table of Contents


While downloading files, you might have downloaded a file with the .oo3template extension. Perhaps you know what the file is, but you simply don’t know how to open it. Thanks to this easy guide you will be able to find out what .oo3template file extension is, how to open it and how to work with it.

What is a .OO3TEMPLATE file?

The file extension .OO3TEMPLATE is from OmniOutliner Template.This file extension was developed by The Omni Group.

What to know

There is currently 1 software that can open the .oo3template file on 1 platform.

How to open a .OO3TEMPLATE file?

In this part of the article we will show you how to open the .OO3TEMPLATE file on various operating systems.

How to open a .OO3TEMPLATE file on Mac

There are 4 simple steps to open the .oo3template file on Mac.

1. In the first step you need to download the The Omni Group OmniOutliner 4.5 software. You will be using this software in order to open the file. Other software that can be used in opening this file is: The Omni Group OmniOutliner 4.5.

Step 2

Step 2: Finding your .OO3TEMPLATE file

2. The second step is locating the downloaded file. The file can be usually found in your /download/ folder if you don’t remember where you have downloaded it to.

Step 3

Step 3: Clicking “Open with”

3. In the third step, after locating your file, right click on it and click “Open with”.

Step 4

Step 4: Choosing the software to open your file

4. In the fourth step, after clicking “Open with”, you should see the The Omni Group OmniOutliner 4.5 software that you have downloaded. Click on the software and click “OK”. That’s all, now you have opened your file on Mac.

Still cannot open the .OO3TEMPLATE file?

If you cannot open the .OO3TEMPLATE file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .OO3TEMPLATE file.ook – Arachne, .op – OpenPAT Report, .op2 – MSC Software, .op4 – MSC Software, .opal – Microsoft. You might be trying to open one of them. Please recheck the file extension again.


In this article you have learned how to open the .OO3TEMPLATE file with the The Omni Group OmniOutliner 4.5 program on Mac.