u/OnThe-Lookout

I have an old 3.5" HDD that I partially disassembled in order to be able to teach some kids at school, and in the meantime my girlfriend as well, how a hard drive actually works and how it looks on the inside, but i want to make it more realistic, and I want to make it spin. However, I don't want to carry with me a small PC or a PSU in order to plug into the wall just for this, I want to macgyver a battery for it. ChatGPT insists that it is a bad idea and that I shouldn't do it, and that's why I came here for advice. I was thinking of connecting a 9V battery to the 12V input, in the hopes that it would spin, just not as fast, or I was thinking of connecting multiple batteries in series, in order to gain 12V out of one 9V battery and 2 AAs, or out of 8 AAs, but i am not sure if it would work the way I expect it to work. Do you have any advice or ideas? Thanks.

Not sure if this is more related to r/VFIO or not, but I will post in both subreddits just in case. I do however feel like this is more of a Hackintosh issue.

So, I manages to install macOS Sequoia (but I checked everything from Big Sur onwards) in a VM, and everything works ok, but I want to pass through a GPU in order to enable video acceleration.

Now, the problem is that my GPU is an AMD E9173, basically an embedded version of the Lexa RX 550, with the GPU ID of 699F. I have found success stories with this GPU, by spoofing it to 67FF, so I decided to try it, and it worked, but not quite...

In my current scenario, if my GPU is not spoofed, it displays an output just fine, but with no graphics acceleration at all, which means that the pass through is working properly. However, once I spoof it through OpenCore Device Properties (but I have also tried with an SSDT), it no longer shows any output on the display once the drivers load in macOS. Basically, I see the Apple logo loading, and half way through, when the GPU drivers would load, the screen would simply go black and the monitor would show no signal. I can connect remotely to the VM using AnyDesk or Rustdesk, and I can see that the GPU is properly recognized as the spoofed 67FF and has full graphics acceleration enabled. And in benchmarks it does perform as expected, for the performance of the GPU.

I do however need a display output or, at the very least, a way to make macOS think there is one connected. I tried with "radcodec", "agdpmod=pikera", I tried adding the "no-gpu-spoof" parameter in Device Properties, and I even tried remapping the framebuffer, but nothing helped. I eventually installed Better Displays in order to create a virtual display to fix my resolution, but without a proper display connected, macOS seems to disable hardware acceleration for some apps...

Specifically, Parsec doesn't work at all right now, and I would need that, because both AnyDesk and RustDesk have a lot of latency and it's not comfortable at all to use the system like that. I tried installing Sunshine and it failed, and it seems very finicky on macOS, so I would like to avoid that, if possible. Right now, on Sequoia, Parsec crashes outright when I try to connect to it, and on Monterey and older I can connect, but it defaults to software encoding, which makes it even more unusable than AnyDesk or Rustdesk. My understanding is that I would need to at least make macOS think there is a display connected, but the GPU disables all outputs as soon as the macOS Graphics Driver loads...

So, what can I do? Is this a known issue, or is there something I am missing about this? Is there something I can do to make the spoofed GPU have proper display output once the driver loads? Or, at the very least, is it possible to make macOS think there is a real display connected, so Parsec could work properly? Thanks.

TL;DR AMD 699F GPU spoofed through OpenCore to 67FF drops all display outputs as soon as the drivers load. I can confirm that the drivers loaded properly by connecting remotely. I want to fix the display output or, at least, make Parsec work.