Hello, I did what you told me to. I put my graphic card in the first PCIe slot available In my mobo (which is the second one, the first one is for wireless adapter). MacOS seems to be a lot smoother but graphic glitches and the problems with your code and olarilla repair permission.command are still there. So I'm going to send you another full dump to see if the problem of the 4x band is gone or is still there.
Send me Lucas-iMac.home-life.hub.zip