3 ms·
I wonder if OpenCore would enable me to (a) passthrough an i915 GPU but not an AMD GPU; (b) run Catalina on a Mac that doesn't support it? I have an ancient ma
by cmurf 7y ago
I wonder if OpenCore would enable me to (a) passthrough an i915 GPU but not an AMD GPU; (b) run Catalina on a Mac that doesn't support it?
I have an ancient macbookpro 8,2 with the defect that eventually leads to AMD GPU failure (it failed, was replaced under warranty extension, failed again same number of years later). I use GRUB iowr.mod and outb commands to disable the AMD GPU on boot so it's not even seen by Linux. But when I boot macOS, at some point during the session something enables discrete graphics and I get a kernel panic. I also get a kernel panic when doing any kind of software update (it's now stuck on 10.13.6).
- Wowfunhappy 7y agoI haven't looked into this for Catalina, but for most past releases, there are community tools for installing the OS on unsupported Macs (to whatever level of success is possible on your hardware). That's going to be a lot easier then OpenCore.
- haxiomic 7y agoI’ve had the same problem with 3 different 2011 MacBook Pros There’s an nvram variable you can change to disable the discrete gpu, details here: https://apple.stackexchange.com/questions/166876/macbook-pro-how-to-disable-discrete-gpu-permanently-from-efi#285896 https://apple.stackexchange.com/questions/166876/macbook-pro... I didn’t go the Linux-live cd route so I have to reapply the fix when nvram is reset but other than that the machines work fine now :)