Smooth and quick update. As usual using the IGFX and "HDMI", most probably because of my MSI graphic card that avoid me to update using it .... I only have issues for upgrades, after the update I switch back to MSI and all is working perfectly
Well in my case the update from 10.15.4 to 10.15.6 wasn't easy.
My current Hardware:
Mainboard: MSI Z170A Gaming Pro Carbon
16 GB RAM
512GB Samsung 850 Pro (M.2 NVMe)
Intel Core i5-7600k
MSI Radeon RX 580 ARMOR 8GB OC
Two LG 4K Displays connected via DisplayPort
Steps I did before I tried the update for the first time:
Made multiple Time Maschine Backups on different HDDs. (as always)
Updated everything with Multibeast 12.3.0
Updated Lilu.kext, AppleALC.kext and WhateverGreen.kext. in /EFI/.../Clover/kexts/other/
Made sure that no old "Hackintosh" Kexts were in /Library/Extensions/
Restarted my Computer to make sure that everything still worked as expected
I removed all unnecessary internal & external Drives so that just my main M.2 SDD was installed.
Then I startet the Update... It look like the update was installing, no errors... nothing! But after a while my computer rebooted right back into MacOS 10.15.4 (without giving me an error message).
So I startet the Update again & made sure that my Hackintosh booted from the right "boot drive" with the name similar to "[...] install ...". No luck! First I tried just changing the EFI/BIOS settings called "Initial Graphic Adapter" to "IGD" & used my Onboard HDMI Output but I had the same behavior.
I had to remove my "MSI Radeon RX 580 ARMOR 8GB OC" Graphics Card completely from my system & manually select the right "boot drive". After that the update installed properly. After the first boot into MacOS the colors looked funny (a lot was inverted, but not everything).
After the successful update I installed my "MSI Radeon RX 580 ARMOR 8GB OC". I had to change the UEFI/BIOS settings called "Initial Graphic Adapter" back to "PEG". After that my system was behaving normally.
I ever restart the machine for check its all fine before run the update and have the system clean, after that Run the update from the System Preferences, boot from the MacOS Install Volume everytime until this volume desapears (2 times as usual in my case).
On the Restart boot from "#yourMacOSVolumeName" and like your iPhone or iPad starts with a Black Screen with the apple on the center and a fine progress bar below. With the 9 remaning minutes process starts all fine!