Asrock Z390, 5 days later still no breaktrough

Mainboard: Asrock Z390 phantom gaming-itx BIOS 1.2 (tried also 1.6 with Asrock Patch) CPU: Intel i5-9600k RAM: 32GB 3000Mhz 2x16GB - Crucial Ballistix LT Sport GPU: Sapphinre RX 580 8GB Nitro (tried also only with iGPU) Wifi Modul: BCM94360CS2 Disk: Corsair NVME MP510 Force 500Gb (Tried also with sata Crucial MX300 500GB)

USB Stick Sandisk USB 3.0 32GB tried installation from USB 3.0 I/O port and Frontpanel USB 2.0 MacBook pro 13.3" for preparing usb Stick Mac OS Mojave 10.14.4 (Also tried with 10.14.6)

I installed to a second nvme Windows 10, where everything works like charm. Memtest was also done, so i think the hardware is okay.

I need your help, sorry to tell this but after 5 days of trying, ive got nothing to loose. The biggest problem seems to be random freezes during bootloader and installation.

I choose the Bios Settings from this thread https://www.tonymacx86.com/threads/success-asrock-z390-phantom-gaming-itx-tb3-igpu-mojave-sff-build.277418/

Used Clover, Unibeast, changed BIOS, changed the memory fixes, nothing.

The biggest problem right now, are random freezes in the bootloader, if i make it, then sometimes it freezes in the disk utility. Once i got it running, got to next reboot phase and there i also got random freezes at 13minutes remaining or 3minutes remaining.

I would like to try a fresh start and step by step with you guys. Im allready there to pay someone for an running Asrock Z390 image.

So whats the base where i can fresh start of ?