kushwavez Posted December 24, 2018 Share Posted December 24, 2018 (edited) Hello! I had a working Sierra 10.12.6 Setup. Mobo: GIGABYTE P61-USB3-B3 (H61 Intel 6 series Chipset, Cougar point, No IGPU, only discrete, Legacy BIOS) CPU: i5-2300 2.9 GHz (Sandy Bridge) GPU: MSI Radeon RX 580 8GB 1. Yesterday I tried to install Mojave but I can't get to the installation screen, I getting black screen after booting. I have 2 HDMI monitor, they have signal, just black. - I think this problem is related to AppleGraphicsDevicePolicy, so I used iMac14,2 smbios instead of iMac12,2 -> nothing changed, same black screen. - Used several AppleGraphicsDevicePolicy patch, nothing changed. And if I understand correctly I have to change the value to "none" in Info.plist, but I can't even get to the install screen, so I can't modify the Info.plist. - Some users can get signal when using DP ports, but my monitors don't have DP connectors, just HDMI. - Tried WhateverGreen + Lilu (same happens without them) and Inect ATI = true, RadeonDeInit = true (same without deinit) - My motherboard doesn't have IGPU, so I can't enable that, i'm just on the discrete. - Some users got to the installation screen by disabling CSM and deleting "CsmVideoDxe-64.efi" : my motherboard is Legacy BIOS (with Hybrid EFI technology) I don't have CSM option - At Sierra it's good, my 2 monitor recognized correctly. So maybe if I will able to edit that Info.plist I can finally have signal, I don't know. Appreciate any help. UPDATE: Got signal on my 1st monitor with DP -> HDMI Installed Mojave without problem, booted to desktop. -> HDMI ports are not working neither DVI, just DP. Looking for a solution. 2. 2nd problem is that my SATA drive doesn't appear in Disk Utility. - At Sierra no problem - High Sierra, no drives -> fixed by restoring AppleAHCIPort.kext v328 to S/L/E - This problem maybe related to my chipset, because maybe that is not supported anymore (Intel 6 Series chipset, H61) - At Mojave I tried to modify the BaseSystem.dmg in the Mojave Installer.app to restore AppleAHCIPort.kext v328 -> My drives got recognized but not initialized, also broke the partition and I have to reformat. - Tried another AHCIInjectors, nothing changed. - AHCI-SATA: Enabled in BIOS -> Fix in #4 Post CLOVER_legacy_p61.zip Edited February 3, 2019 by rtke333 Link to comment Share on other sites More sharing options...
bigben1 Posted December 24, 2018 Share Posted December 24, 2018 to install Mojave don't use Hdmi port but try DP to install , once installed then u can switchover to HDMI ports. Link to comment Share on other sites More sharing options...
Gigamaxx Posted December 25, 2018 Share Posted December 25, 2018 DisplayPort to HDMI adapter? Link to comment Share on other sites More sharing options...
kushwavez Posted January 8, 2019 Author Share Posted January 8, 2019 Fixed SATA problem with : new ICH patch by vit9696. AppleAHCIPort Find 40600200 Replace 00000000 You're right guys, but I didn't have a DP to HDMI adapter. Now I got one, so I tested it: Got signal on my 1st monitor with DP -> HDMI Installed Mojave without problem, booted to desktop. -> HDMI ports are not working, just DP. Looking for a solution. Link to comment Share on other sites More sharing options...
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