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hi yes i have tried all ports on the card and its this card i have https://www.techpowerup.com/gpu-specs/radeon-rx-6600.c3696

have you tried with differe GPU output ports? which model of GPU? it is weird and i am loosing hope because i have no others ideas

Okay, so removed 4090 and put RX 6600 in slot one. It displays the bootloader and then a black screen, as i have an LG tv it shows its receiving a 1080p signal but i dont see verbose or anything

I know i am asking so much 🙂 could you put Rx 6600 in first slot? are you sure you are trying from my latest EFI? it seems you loose hdmi connection or there is always a signal also with black screen?

It is water-cooled but i have just removed it from slot and disconnected power to it (4090) so only RX6600 is in the system i see the bootloader and then when i select Mac it shows a black screen i dont get and verbose or anything I have also reset bios and changed setting as stated above and still same issue

is it watercooled or you can remove easily it? because it is weird if your RX is working well in other os can you connect only a monitor to RX 6600 and try to boot to your USB as i see in your video? then will think to full installer problem 🙂 I have a doubt if it is a problem with installed 4090

Yes the boot menu is on the 4090. The 6600 does not display anything, but when I click mac it will briefly flash like it's getting a signal then just stay black i cant seem to find a full installer that will give me a dmg image they all download as pkg files

bios settings are well done for OSX? usually is possible to load default settings, disabling secure boot keys and fast boot, also to set CSM off and UEFI on, 4G on should be enough for many setups

then with my efi you should see a "dos" verbose scrolling lines Boot menu i see there is from gtx 4090? We should see it on RX 6600 usb pen seems to be formatted well

it could be normal if you use 4090 try to connect your monitor(s) to rx6600 you should also prvide a full installer and not a recovery installer because in tahoe your ethernet card could not work and a recovery installers needs a working one ethernet

So on the 4090 i see the bios and press F4 to boot from UEFI USB, and i see the bootloader showing Mac (usb drive) and my Windows installation. I then select Mac and both monitors go black i have left it for an hour while i did a few errands, and when I came back still the same black screens I formatted the USB as FAT32 and GPT using Rufus, like the below screenshot see below video both gpu plugged into tv as other monitor was borrowed and needed to be returned (4090 on HDMI 4) (6600 on HDMI1)

... grazie dany per rispetto anche di chi ha scritto quei post / guide , anche se al giorno d oggi possono sembrare obsolete e' giusto che rimangono li , come hai anticipato c e' tanta roba fresca di giornata Una letta al regolamento ad esempio non farebbe male , se si vuole chiedere aiuto , iniziando ad esempio nel mettere in firma il proprio Hardware

Stringa eliminata. Ora provo a reinstallare il Lexar, che sino a Sequoia non è mai stato oggetto di panic e vedo se Tahoma lo digerisce. Certamente il layout-id 01000000 ad un controller NVMe è qualcosa dall'esito misterioso. 🙂

Benvenuto. Ci sono post datati.....???? Si forse....ma ci sono anche molti freschi freschi di giornata.

Do you mean also no video input of your bios scanning? or do you see opencore bootloader? you must start from your USB pen or disk and you have to format it in a proper way for EFI

@Xsario, try this instead of USBMap.kext. USBMapDummy.kext.zip

La stringa PciRoot(0x0)/Pci(0x1b,0x0) la puoi eliminare del tutto , va usata per dichiarare l audio ma da Haswell in giu' se non ricordo male Mentre su macchine piu' recenti in PciRoot(0x0)/Pci(0x1F,0x3) , volendo neanche questa , si puo' definire l audio anche in boot-args - > alcid=xxx Si possono dichiarare tutte le periferiche in DP , non cambia nulla a livello di prestazioni , nei veri mac non trovi le periferiche in DP se non in resoconto di sistema , ioreg... Mi riferivo all inserimento della scheda WI-FI visto che non la trovava , ma potrebbe essere una cosa temporanea legata alla nvram

So it was originally in the bottom black PCI-E slot; it is now in the second slot down Still no picture on either monitor: i have tried different HDMI leads i have tried multiple usb ports and drives all same results no display i'm probably doing something wrong or stupid

Ora che guardo meglio l'elenco PCIe di Hackintool, vedo che alle tre porte radice PCI Express (#21,#17,#9) sono collegati i miei 2 NVMe Sabrent mentre la terza (#17) è senza l'NVMe (Lexar) che ho rimosso. Ma controllando in Device Properties noto che la porta #17 ha, da suggerimento Dortania, un layout-id 01000000 (???) riferito all'audio (?) Che sia questo il problema che ha impallato l'installazione di Tahoe con il controller del NVme Lexar?

Risolto Grazie al grande maestro @Anto65 tutto funzionante al 100/% Grazie di cuore

Grazie ancora @Anto65, anticipi anche quelle che sarebbero state le mie intenzioni. 🙂 Effettivamente quella di avere un solo EFI per entrambi i sistemi era il mio obiettivo iniziale che ho rimandato per i problemi avuti con l'NVMe. Per quanto riguarda l'inserimento delle proprietà delle periferiche tratte da Hackintool in Device Properties, quali tra tutte è possibile inserire e quali no? Suppongo che possano/debbano essere inserite quelle che riguardano i controller delle periferiche installate fisicamente nei vari slot PCI e NVMe. Escludendo quelle di classe Bridge di stretta pertinenza della mobo/processore. Immagino che anche il controller USB, quello Ethernet e Audio possano essere inseriti ma non so con che benefici. Essendo onboard la loro presenza dovrebbe essere segnalata ed esposta nel DSDT.

@khile have you installed in black pcie slot your gpu? ssdt bridge is for the second Pcie gray slot

have you connected your monitor to rx 6600? in my EFI there is a bridge for latest PCIE slot of your motherboard (the address should be the same) do you see a boot menu? then i have put -v boot arg to your config.plist so you should see after bios stage an opencore bootmenu then an icon with your installer..and then some verbose scrolling text lines

So i was trying to install Tahoe and slot one nearest the IO i have 4090 then slot 2 is empty and in the bottom slot i have the 6600 - with the above attached EFI i still get a black screen im guessing i need a SSDT bridge? ,i have tried to create this with ssdttime but same results but i'll be honest i dont really know how to use that tool thanks again for all the help DSDT.rar

/Library/Developer/KDKs/ ... intendevo come ultimo il KDK non OCLP-MOD