Hi there whats your System Defination ?Update via AppStore (after updating clover) went fine on an old Intel i5 and Radeon HD 7850, luckily no flickering and no graphic issues.
No NightShift but that was to be expected because of my old system definition (anyway I found f.lux to be way superior, esp. because of the slow changing to warmer levels, compared to the "binary" change of NightShift... so I'm not going to fiddle with my system definition )
There is nothing to update. Check that the SSDT is not corrupted, that it is not conflicting with Clover graphics injection settingsI used Clover HDMI audio for years, but as of 10.12.4, the ssdt-2.aml no longer seems to load. I think Clover HDMI audio needs an update (the current version is over a year old) so that the HDMI SSDT loads.
Can explain how you fixed the flickering?1. SwitchResX or DisableMonitor temp solved my flickering screen problem on AMD HD6xxx.
2. Fix no Bluetooth problem using "Method 2: Remove potentially corrupted files" from
http://www.idownloadblog.com/2016/02/01/experiencing-bluetooth-problems-on-your-mac-try-this/
Thank you for your help. Back to the drawing board