Soon, I had a few compiler errors to fix for Mac and also switched over to the IWYU model. Everything appears to be working correctly now. Submitted what is hopefully the final version last night, so within a day or two I hope!
Note: I’ve had no choice but to suspend Mac / IOS support for the 4.18 version - but 4.19 supports it fine. There is a compiler error when using XCode 9.3 and above which was fixed in 4.19 but not 4.18. If you want to ship to Mac/IOS in 4.18 you can, but it requires building the plug-in yourself with an earlier version of XCode and adding the whitelist platforms back in.