Okay, I can say that the Safari crash is fixed with these 2 kexts:
4:080 0:009 Extra kext: EFI\CLOVER\kexts\10.12\IntelGraphicsFixup.kext
4:086 0:006 Extra kext: EFI\CLOVER\kexts\10.12\Lilu.kext
, but the issue itself is not completely solved to me (on "Intel HD Graphics 4400", MB: Asus B85M-E).
For example, when I select the screensaver "Arabesque" my system start lagging and I see the following messages in the system log:
Sep 20 09:35:10 iMac Dock[358]: BUG in libdispatch client: kevent[EVFILT_MACHPORT] monitored resource vanished before the source cancel handler was invoked
Sep 20 09:35:28 iMac com.apple.xpc.launchd[1] (com.apple.DumpGPURestart): Service only ran for 6 seconds. Pushing respawn out by 4 seconds.
Sep 20 09:35:34 iMac com.apple.xpc.launchd[1] (com.apple.DumpGPURestart): Service only ran for 2 seconds. Pushing respawn out by 8 seconds.
Sep 20 09:35:43 iMac com.apple.xpc.launchd[1] (com.apple.imfoundation.IMRemoteURLConnectionAgent): Unknown key for integer: _DirtyJetsamMemoryLimit
Sep 20 09:35:43 iMac com.apple.xpc.launchd[1] (com.apple.imtranscoding.IMTranscoderAgent): Unknown key for integer: _DirtyJetsamPriority
Sep 20 09:35:43 iMac com.apple.xpc.launchd[1] (com.apple.imtranscoding.IMTranscoderAgent): Unknown key for integer: _DirtyJetsamMemoryLimit
Sep 20 09:35:43 iMac com.apple.xpc.launchd[1] (com.apple.imdmessageservices.IMDMessageServicesAgent): Unknown key for integer: _DirtyJetsamMemoryLimit
Hope there will be a solution for this as well.