Working Catalina on GA-H77n-wifi, intel HD4000 graphics, Dell DW1515 wifi card

[boltun]

if this would be of help to anyone still using GA-H77n-wifi gigabyte mini ATX
My computer use if for basic stuff only

have been on high Sierra(dual boot with Win 10 on single SSD) for a few years, had problems with Mojave and gave up.
Tried a few Catalina fresh installs/update from high Sierra, with problems on sleep, screen resolution, wifi
after a few trials it seems to have sorted out, do not ask my how, I do not know much about tweaks/SSDT/id etc...

Did a fresh install.
set up Catalina
booted from USB, low screen resolution
Mounted EFI
installed Clover 'Clover UEFI Boot Mode v2.5k r5102'
added these kexts to Clover/Kexts/other folder -
AirportAtheros40.kext
AppleALC.kext
FakeSMC.kext
IO80211Family.kext
Lilu.kext
NullCPUPowermanagement.kext
WhateverGreen.kext

rebooted - everything worked except display/screen resolution

replaced config.plist in EFI/Clover with config.plist from my working high Sierra (this seemed to solve the display resolution)
was at default boot to recovery drive in clover after I had swapped config.plist, in config.plist changed boot volume name to my current boot drive and now clover set by default to boot from Catalina drive

i5-3570K
Dell D1515 wifi card
apple bluetooth keyboard
logitec mouse M235
Samsung SyncMaster 226 display, 1680x1050 (other options I can see in display 1344x840, 1024x640)
audio - line out one -audio through orange port, line out two -audio through black port
USB 2.0/3.0 ports work - not checked speeds
sleep works

overview info:
iMac 27inch late 2013 Macmini (6,2)
3.39 GHz quad core intel core i5
8gb ram
intel hd graphics 4000 1536mb

thank you 'itwas' - I have updated

 

[itwas]

your hardware configuration, the best matched SMBIOS should be Macmini6,1 or Macmini6,2

do not use the NullCPUPowermanagement.kext for Power Management

 

[imastun]

thank you so much for posting this, this has me thinking I'll try an upgrade. I've got an H77N-WIFI build running High Sierra and I've been wanting to upgrade but got frustrated with a couple tries at Mojave. I'm thinking I might try again with Catalina, but I also use a dedicated NVIDIA GTX 650 Ti, do you think I can still use that Graphics Card, and if I wanted to upgrade, might you have any suggestions for basic edits in FCPX?