Izzard

I'm just going to mention, once again, that my GTX 970 + AKiTiO + 2011 Mac Mini + Windows works absolutely beautifully *BUT* only works at all if I switch the eGPU on at exactly the right moment. I have to power on the Mac, then the eGPU about 1 second later. If it's too early or too late then I get a black screen instead of Windows booting. Waiting for the Mac startup chime is far too late in my case.

Here's my visual guide to opening the ATiKiO case.

I feel bad for saying this because I can see you have put some effort in, but actually I think your guide could confuse people. It doesn't go into enough detail (e.g. step 1 says to drag PackageMaker into your Applications folder; that requires more explanation). Then "copy one line of kext file click desktop to reviel finder in top left corner" doesn't really make much sense at all. By all means have a go at putting together a guide for newbies, but as a downloadable PDF it's very hard for you to revise it to correct mistakes without leaving erroneous versions scattered around. How about you just start a thread instead? Please don't take my criticism too harshly.

I realise this thread is all about AMD cards but I just want to say that this sounds similar the same baffling issue I have with my NVIDIA setup. (Mac mini 2011, GTX 970 in an ATiKiO). In other words, if I don't modify IONDRVSUPPORT kext then it boots but shows only as "NVIDIA chip model" in system information. Whereas if I correctly modify IONDRVSUPPORT then Yosemite kernel pancs at the point it tries to start the login screen / desktop. (And it works great in Windows.) None of us has come up with the answer to this but the only key difference with my system to other Mac minis is that it has a Radeon dGPU.

Guide to opening up the AKiTiO 2 Other reference: http://forum.techinferno.com/enclosures-adapters/7205-us%24189-akitio-thunder2-pcie-box-16gbps-tb2-113.html#post128029 Guide Powering the AKiTiO via the barrel socket with your ATX PSU Other reference: http://forum.techinferno.com/enclosures-adapters/8317-%5Bguide%5D-making-molex-barrel-adapter.html#post113069 I hope these are a useful reference. Happy eGPU-ing!

@notrodash I wrote some comments about that issue here.

Not as far as I can find. Only different cards, different minis and different OSes. But never mind - I don't mean to threadjack.

I really meant a Wikipedia-style wiki that anyone can edit. But maybe that would be a disaster with some of the... um.. characters around here

@MVC I know it's still a mystery why my GTX970 eGPU kernel panics Yosemite booting on my Radeon dGPU 2011 mini (despite working great in Windows) - but do you think it's worth trying to flash it as a solution?

I've just read the last few days' worth of posts and I'll repeat what I've said before: a wiki would help at this point. There is information being repeated (wasting time) and misinformation being repeated (wasting money). Plus some useful hints and links which only exist in this Mac-oriented thread which our PC-only friends are likely to miss. Let's get the best advice, best photos and best links in one place?

I noticed the same discrepancy. MaximumBurrito's, symptoms, as described, don't make sense to me unless there is some sort of hardware issue. MaximumBurrito, perhaps you should double-check the two boards of your AKiTiO are connected properly. Is the short black/yellow power cable dislodged? (Although I wouldn't expect the GPU fans to turn if the GPU can't see the PCIe bus.) If I were you, I would think about getting a simple PCIe card (ethernet adaptor / USB ports or similar) to see if those work. They are cheap and if you value your time/sanity then it's a worthwhile troubleshooting step.

When you did that, did you then get the complaints in the log/ colsole about IOPCITunnelCompatible being required? Have you ever seen them? Because if not, nothing you’ve said suggests the ATiKiO thunderbolt board can talk to the PCIe board. I think your symptoms are what you’d get if it were supplying power to the GPU and nothing else.

Yeah… right back in my first post about this problem (different install of Yosemite and the previous NVIDIA driver), that same console output was right there at the end. MVC, do you still think it's wrong that it says this in the console? Does yours say something different for "loaded and registered"?

- - - Updated - - - There's no kext called NVDAGM100HAL in my Extensions folder: And looking at the plist file for NVDAGM100HalWeb.kext it has an IOClass value of "NVDAGM100HAL": …could it be that the correct kext loaded but it reports as NVDAGM100HAL? In which case, why doesn't your console do the same? This is the new driver that came out today.

Hmm, well I'll explore that angle next but this is a (relatively) fresh install of everything. A few days into this saga I wiped the SSD and rebuilt from scratch with a totally clean install of Yosemite (straight to 10.10.3) and installed nothing but the latest NVIDIA driver - and I still had the symptoms (i.e. kernel panic instead of login screen). And I've posted this part of the console output previously too because I was asking about the "[AGPM Controller] unknownPlatform" - but I'll have to read back through my posts now to see if it was the same. (It probably wasn't, considering your surprise at seeing NVDAGM100HAL).