Just passing along some info...
Various places on the internet (e.g., https://sharewareonsale.com/?os=mac&redirected=1
) are offering a no-charge download of the older DxO Optics Pro 9 Elite Edition software. Versions for both Windows and Mac OS are available.
The offer ends in middle February, 2017.
After you download, you need to register your e-mail address and they send you an activation code to that address. Read the various pages carefully and you can't go wrong, although the path is sometimes a little less than obvious. YMMV.
Version 9 cannot be upgraded.