You’ve tried to manually install kext extensions for you Mac OS.
You’ve meddled with permissions and copied the files, but things aren’t working.
The solution is to simply use the Kext utility.
Of course there are several prerequisites, but simply spend some time fixing them, and you’re going to thank me for the amount of time you have saved.
The problem with all the guides around is that they are mostly written by hard-core or self-taught developers – so only they would understand what they teach. And most of these guides are hard to follow and get right. That’s what this site is for, building advanced guides that are simple to follow – for the pros and newbies alike.