Hi MaLd0n,
I successfully managed to install macOS Tahoe 26.5 onto a new partition from my working macOS Sequoia setup. However, I am currently stuck on a very specific display issue.
After completing the installation, the system boots fine, but right where the setup/desktop should appear, I get a completely black screen, but the mouse cursor is visible and moveable.
My Hardware Specs:
CPU: Intel Core i5-12600K (Alder Lake)
GPU: AMD Radeon RX 6700 XT 12GB (Navi 22)
Motherboard: AsRock B660M (Using USBToolBox.kext + UTBMap.kext for mapped USBs)
OpenCore Version: 1.0.7
My EFI file : https://www.mediafire.com/file/fxsvoswk0e81tpo/EFI.zip/file