Uninstall or Reset Capture One Pro 6 & 7

Here is a step by step process on effectively uninstalling Capture One completely from Mac OS X 10.7 and 10.8.

1. Deactivate your license on the current installation of Capture One, this can be done by going to Capture One > License > Then clicking Deactivate.

2. Quit Capture One then delete the main application by dragging it to the trash as displayed in the banner for this post, this is located in HD > Applications > Capture One

3. Navigate to User > Pictures > Capture One Session, here if you are using Capture One 7 you will see a file titled Capture One Session.cosessiondb. Delete this.

3b. If you are using or have used Capture One 6 then there will also be a folder within the Pictures directory titled Capture One Library, in there you will see a Capture One.col file, delete this as well.

4. The next step requires you to access the User Library which is hidden by default in 10.7 and 10.8. You may access it through two different ways:

4a. With a Finder window open go to the drop down labeled “Go”, once that is open hold down the “Alt” key, this will reveal the hidden Library folder in the list. Once you click on that we can move to the next section.

4b. Another method to access this is to select the “Go” drop down from within a Finder window, once there select “Go to Folder…”, enter the Library destination into the window that appears ”~/Library”. This will automatically take you to the Library folder

5. Navigate to User > Library > Preferences, here you find many .plist files, we are looking for ones that start with com.phaseone.captureone. If you have Capture One 6 installed they will be simply called com.phaseone.captureone.plist com.phaseone.captureone.LSSharedFileList  respectively. If you have Capture One 7 installed they will be labeled com.phaseone.captureone7.plist com.phaseone.captureone7.LSSharedFileList. If you have had at one point Capture One 6 installed you may see all of these files. Delete all of these.


Since OS X 10.9 Mavericks (and OS X 10.10 Yosemite) caches the preference files, you will need to flush the cache before deleting the preference files. To do this, open up the Terminal application on your Mac and type: “killall -u $USER cfprefsd” then press return. Now you can delete the preference files.

6. Now proceed to the Application Support folder within the Library, User > Library > Application Support > Capture One. If you would like to save any styles, workspaces or preferences this will be the time to do so by backing up the appropriate folders. I recommend deleting the entire Capture One folder as this without a doubt will clear any bad settings or pref’s.

Reset Capture One

Let’s say you don’t want to completely uninstall Capture One but need to reset it for a few reason. Here are the steps to take, much of it is the same as above minus deleting the full application:

  • User > Library > Application Support > Capture One
  • User > Library > Preferences > com.phaseone.[anything] 
  • User > Pictures > Capture One Default Session > Capture One Session.cosessiondb
  • User > Pictures > Capture One Library > Capture One.col (This may or may not exist depending on which version of Capture One you are using)
  • HD > Library > Application Support > Capture One

Note: that if you need to maintain specific files such as LCC files you can move them out of their specific subfolder prior to uninstall Capture One and, after uninstalling/re-installing, place them back into the appropriate subfolder.

Last Resort

You’ve done all above but you are still have issues with a particular session, you can delete all of the proxy and cache files related to that session. This will force Capture One to recreate previews and focus mask files.

1. Navigate to your session folder, within the main directory navigate to Capture > CaptureOne > Cache > Proxies. Here will have all your preview and focus mask files, .cop & .cof respectively. Delete these. You can also do a system wide search and delete for .cof & .cop files to eliminate any more variables if just deleting local session .cop & .cof files does not help you.

Note: The Settings70 folder contains all of your adjustments for sessions, deleting this will erase all adjustments for that session. It is more recommended that you move just your RAW files into a new session rather than deleting this whole folder as you can always move this folder over if the above corrects your issues.

Always double check before you delete anything, never delete any RAWs unless you are absolutely certain! Have any questions? Leave us a comment!

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