Re: Issue Compiling OCIO Under OSX and vcpkg.
Issue 1179 is the issue in OpenColorIO GitHub concerning the problem on which some help will be greatly appreciated.
In the meantime I only see a manual compilation as a solution to the problem i.e. compiling and installing OpenColorIO so that OpenImageIO can find it.
Please refer to the following file to understand how OpenImageIO is working to find OpenColorIO: