Also, check if there are any specific XML files that are commonly used with older Photoshop versions. Maybe include examples or categories like action sets, preset bundles, etc. But avoid listing specific files since that could be problematic.

Also, the installation process: where to save the XML file, how to import it into Photoshop. Maybe explain that they can go to Presets Manager and import. But since the user is on Mac, specific instructions for that OS. Also, note that the steps might vary slightly depending on the type of XML file (presets vs brushes vs gradients).

Wait, the user is asking for a free download, but I should check if there are legal issues. If someone is distributing free XML files for Photoshop, they need to be from a proper source. I should advise using reputable websites like Adobe's own site, DeviantArt, or other design communities. Maybe provide links to safe sources or instructions on how to find them.

I need to make sure the post is helpful without breaking any rules. Since I can't provide direct links to copyrighted files, I have to guide them on finding legal resources. Emphasize the importance of using official channels or trusted creators who offer their files for free. Maybe mention that some creators update their files for newer versions, so there might be issues with CC 2017, but they can try using it anyway.