Graphics issues usually stem from an unsupported GPU, missing acceleration patches, or incorrect boot arguments. Below is a systematic approach to diagnosing and fixing them.
Step 1 — Verify GPU Compatibility
Check if your GPU model is natively supported in your target macOS version. AMD Radeon RX 400/500/5000 series generally work natively. NVIDIA support ended at High Sierra for most cards.
Step 2 — Update Essential Kexts
Ensure Lilu and WhateverGreen are installed and current.
Step 3 — Configure Boot Arguments
Add -v keepsyms=1 debug=0x100 for debugging. For AMD cards add agdpmod=pikera.
Step 4 — Confirm Metal Support
Open About This Mac > System Report > Graphics/Displays. Metal support should be listed.
Expected Results
- Graphics acceleration is smooth
- Correct resolution on all displays
- No GPU-related kernel panics
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Original Question: "It booted once than completely darkness."
I have a desktop PC with gigabyte z390UD, Intel i5 9600k with integrated GPU. For the first time ever I successfully installed Catalina with clover but after a reboot the PC have no HDMI signal at all. I can't even see the bootloader but the PC seams to work correctly as leds light up and makes normal noise. Did I make something bad? Could be a software problem or is dead hardware? Is related to hackintosh or just a case? Thanks I don't know where to start for solving this
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