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Wouldn't think about it, as it already states there's no support on the web page for Hackintosh. But thanks for the info as if I understand you correctly, the Kepler patcher will break Delta updates just the same. - Cheers.

Hi. I used OCLP on an old T5400 running Monterey 12.01 that has a K600. It worked fine putting the Nvidia drivers back. I didn't use any of the other functions of it though so can't comment on those. I only saw the Kepler patcher later on and haven't tried that. Using OCLP I lost the short...

So this is what I did please excuse any rambling on.... I aquired a new (second hand) edition of hardware (well new to me), a Gigabyte GAZ97-HD3 motherboard. Not knowing if it was any good and didn't want to spend out on a processor in case it was no good, I purchased the lowest cheapest CPU I...

I updated Mojave on my Z97 to Big Sur without issues, I did not update over the Mojave volume, but used a separate hard drive for Big Sur. This was straight forward. When Big Sur was up and running I installed CCC and cloned the drive to a bare drive as CCC wanted full access to erase it. The...

I've seen weeks waste away over this very same issue. Yes the nvram sure is so weird. F11 is you friend :lol: Now all we need is an OC guru to actually post a known working OC folder for the 990. So glad it was of help to you. :wave:

OK I just find up the 990. Attached is full EFI, hope I don't get into trouble for this. mods please note:- no system s/n, smuuid or board s/n etc. Smbios is set to MP6,1. I never changed it back to iMac 14,2 as I was booting BS. This 990 has just booted from this EFI so I know for sure it...

If you end up going back to Mojave and it boots ok, then why don't you see if you can upgrade Mojave to Catalina from there? Thats what I would be tempted to do. Meanwhile, I'm on the T5400 so I'll shut this down and reconnect all the wires and fire up the 990. Then I'll post post the EFI...

Did you have the efi mounted on the volume you are try to install to? I ask because every time I've tried it with it mounted it always fails for me at least.

There are two disks/volumes with Catalina one is system and one data. Do you have a bootable usb stick? How are you booting on the 990? UEFI or Legacy? Can you get to the clover boot menu? If so, press F3 to see all volumes, then try the recovery volume. I had a very troublesome time with my...

@OSX790, not sure if your referring to myself or @cfrancis21? - What version of clover are you loading and what OS? From my end opencore will not load either Catalina or Big Sur on the 990, yet clover will, albeit hit n miss. Once its up its fine, the issue arrises upon a restart - it just...

What version of clover are you using? With 5131 on my Optiplex 990 it would boot intermittently, I had to press F11, then remove all boot options (from the menu select), or use single user via the spacebar at menu. It gave very strange results; sometimes booting ok, sometimes not. I even had to...

Thanks for quick reply, everything is same except I put graphics card backs I'm back on High Sierra. I can change profile to show Quadro K600 video card if thats required ? Is that what you mean? Nothing else has changed on the T5400 other than that.

Hello all, Ive been lurking here for a few years now, managing to solve my issues by reading most of other peoples posts and answers. I have an old Dell T5400 that is currently running High Sierra well. I have managed in the past to go from Snow Leopard to current High Sierra without too much...