What is a .COS File And How To Open It – Phase One (Simple Steps)

Table of Contents

Introduction

Have you came across a file with the .cos extension, but it is a file you have never seen before? You most likely know what the file is, but you might be unsure on how to open it. That’s why you are here! We have made this guide for you to learn more about the .cos file extension and how to open it.

What is a .COS file?

The file extension .COS comes from Capture One Settings File. The creator of this file extension is Phase One. This settings related file is in binary format.

What to know

There is currently 1 software that can open the .cos file on 2 platforms.

How to open a .COS file?

Below we will show you a step-by-step guide on how to open the .COS file on various operating systems.

How to open a .COS file on Windows (7, 8, 10)

To open the .cos file on Windows, please follow these 4 easy steps.

1. In the first step you need to download the Phase One Capture One software. You will be using this software in order to open the file. Other software that can be used in opening this file is: Phase One Capture One.

Step 2

Step 2: Locating your .COS file

2. In the second step you need to locate 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: Choose “Open with”

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

Step 4

Step 4: Choose the software and click ok

4. In the fourth step, after clicking “Open with”, you should see the Phase One Capture One software that you have downloaded. Choose your software and click on “OK”. That’s all, now you have opened your file on Windows.

How to open a .COS file on Mac

We have written below an easy-to-understand guide on how to open the .cos file on Mac in 4 easy steps.

1. The first step is to download the Phase One Capture One software. This software will be used for opening the file. Other software that can be used in opening this file is: Phase One Capture One.

Step 2

Step 2: Finding your .COS file

2. The second step is locating the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

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. After choosing the “Open with” option, you will have an option to choose the Phase One Capture One software you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Mac.

Still cannot open the .COS file?

If you are still unable to open the .COS file, it might be because you are trying to open the wrong one. The .COS file extension is similar to other file extensions such as: .cos – Creature Labs. You might be trying to open one of them. Please recheck the file extension again.

Conclusion

In this article you have learned how to open the .COS file with the Phase One Capture One program on Windows and Phase One Capture One program on Mac.