[GUIDE] macOS Catalina on ASRock DeskMini 310 with 9th Gen Intel Core CPU, Dual-Boot

[Jasonnz2018]

My CPU is Coffe Lake too ... no problems so far - everything works nicely with Macmini8,1.

Here is my EFI ... it's basically viorel78's. I added only some settings for Filevault. Plattform>Generic is empty ...

Ok thanks for that, I just think OpenCore feels more snappier then clover

 

[EDL]

OpenCore is a real advantage - no question. Also, macOS itself feels (!) a bit more responsive.


This morning I had a very tiny / or very very short gfx error. Some seconds after wake from sleep but it was gone after immediately. Screen was messed up with colorful noise. This never happens before. But I can remember I had something like this also on real Macs (for instance with my last Mac mini 2012). This could also be related to the monitor itself or the wire. Who knows …

 

[viorel78]

The boot args didn't brought anything new BUT: you 're using the same graphics device properties in your config I used in Clover and 10.15.3

And now it works! I have some heavy on/off switching/flickering (maybe 5 times) at the end of the boot procedure before the desktop is finally shown, but at the end everything is nice. The same behavior I had in Clover.

Instead of 1536MB graphics memory now it's set to 2048MB in the about Mac info. That's probably wrong?

@Jasonnz2018
Why you configured an iMac 19,1 instead of a Mac mini 8.1?

@viorel78
What do you think about this?

settings in your config:
View attachment 470538

My (and others) settings where dual monitors are working:
View attachment 470536

Hi. I see you managed to fix a dual monitor)
igfxfw - is a patch to use a apple firmware encoding we can enable in bootarg or enable in device properties no matter where to prescribe
framebuffer-unifiedmem - that patch set the memory VRAM to 2046 (try to remove this line for test)
igfxonln=1 boot argument or (force-online device property * force-online-<01000000>*) to force online status on all displays. Fixed in latest WhateverGreen
I have only 1 monitor and it is 1920 /1080 an its conected via DP - so i do not need all this patch

 

[viorel78]

Check HDMI and yes it work

 

[EDL]

Thanks for your comments Viorel. I removed unifiedmem and the memory is now 1536MB as it should ... great! Thanks again for your work - your great OC-EFI. Deskmini rocks!

 

[Jasonnz2018]

My CPU is Coffe Lake too ... no problems so far - everything works nicely with Macmini8,1.

Here is my EFI ... it's basically viorel78's. I added only some settings for Filevault. Plattform>Generic is empty ...

i am on a 9th gen i5 9400, i see the the config.plist the model is 8th Gen Core Processor Host Bridge/DRAM Registers, if i want to try your efi, what do i need to change in the config.plist,

cheers

 

[viorel78]

i am on a 9th gen i5 9400, i see the the config.plist the model is 8th Gen Core Processor Host Bridge/DRAM Registers, if i want to try your efi, what do i need to change in the config.plist,

cheers

can use without changes,
( 8th Gen Core Processor Host Bridge/DRAM Registers = intel H310 chipset)

 

[Jasonnz2018]

can use without changes,
( 8th Gen Core Processor Host Bridge/DRAM Registers = intel H310 chipset)

Now let’s wait for evergreen to fix the flickering on boot then this little beast is perfect

 

[Jasonnz2018]

Ch

can use without changes,
( 8th Gen Core Processor Host Bridge/DRAM Registers = intel H310 chipset)

cheers for this I see u have configure a lot of the info in the config, compare to the one I have, great work cheers

 

[Jasonnz2018]

1015.5 broke the hdmi fix, if the hdmi is plugged in the system reboots, i shouldn't off done this upgrade,
is there a way to revert back to 10.15.4 without loosing data

cheers