I still use Clover. It's a relatively old project and it's completely open source. It has been worked on by a lot of talented developers over the years, some of who are based in Russia—but I'm disinclined to dismiss it out of hand because of that. Particularly since it long predates the most-recent international craziness.
The new standard for Hackintosh bootloaders is OpenCore, but I've been using Clover for years and haven't had any problems with it. And, I suspect Clover has been tested more extensively with older versions of OS X, just by the nature of when it was developed and released.
The new standard for Hackintosh bootloaders is OpenCore, but I've been using Clover for years and haven't had any problems with it. And, I suspect Clover has been tested more extensively with older versions of OS X, just by the nature of when it was developed and released.