I initially tried to use HackinTool to update my Clover version prior to updating from 10.15.3 to 10.15.4 but it somehow messed up my install and I was left with a black screen at boot. To recover I built a new USB install stick with UniBeast 10.1.0. I also downloaded MultiBeast 12.1.0 to the USB stick. I booted up my machine with the new USB stick and instead of doing a new install I ran MultiBeast 12.1.0 to update Clover to r5107 and install the appropriate kexts. This restored my Hackintosh to operation. I then ran the 10.15.4 Update from System Preferences Software Update. The update process went smoothly and 10.15.4 is up and running.
Wow! I'm really late to the party this time due to a move. Updated to Clover 5108 using the new Clover App. Updated Lilu, WhatEverGreen and VirtualSMC. Update went mostly good, but took about an hour. There were several long pauses where it seemed it was stuck, but just needed more time to work. On the first restart, it booted into the UEFI. After I restarted from the UEFI, it worked as normal.
Z390 M Gaming build with RX 580. Update clover to 5107, update kexts. Direct update from 10.14.6 to 10.15.4, 3 reboots but no sound. Fix with the method talked about in the forum. Another smooth update. Thank you!
Success! My only hiccup was with Clover... I tried updating while still using Clover v5107 and it kept hanging after the first reboot. Updating to v5108 fixed that and update went smoothly. No one to blame but myself as it says it right in the update guide .