Expanding the disk of your Proxmox macOS VM

Have you run out of room on your macOS VM’s disk? Here’s how you can expand it.

In the Hardware tab for your VM, select your disk and click the “resize disk” button at the top of the page. Enter the size increment in gigabytes (note, this is not the final size you want to achieve, it is the amount the disk will grow by).

Continue reading Expanding the disk of your Proxmox macOS VM

Installing macOS 12 “Monterey” on Proxmox 7

This tutorial for installing macOS 12 Monterey has been adapted for Proxmox from Kholia’s OSX-KVM project and Leoyzen’s OpenCore configuration for KVM. You can get the full sourcecode of my OpenCore release on my GitHub here.

Requirements

I’ll assume you already have Proxmox 7 installed. You also need a real Mac available in order to fetch the OSK key.

Your Proxmox host computer’s CPU must support SSE 4.2, so for Intel your CPU must be at least as new as Nehalem, which was the first CPU generation to bear the “Core” i5/i7 branding. Older CPUs will cause Illegal Instruction crashes when apps/extensions attempt to use these missing instructions.

Modern AMD CPUs also support SSE 4.2 and will work with this guide.

Continue reading Installing macOS 12 “Monterey” on Proxmox 7

Installing macOS 12 “Monterey” Developer Beta on Proxmox 6

With the public release of Monterey, this guide is now obsolete, please use my new installation guide instead

This tutorial for installing macOS Monterey Developer Beta has been adapted for Proxmox from Kholia’s OSX-KVM project and Leoyzen’s OpenCore configuration for KVM. You can get the full sourcecode of my OpenCore release on my GitHub here.

Requirements

Since Monterey is still in closed Developer Beta, you need to be an Apple Developer and have access to a Mac (or Mac VM) to download it.

Your Proxmox host computer’s CPU must support SSE 4.2, so for Intel your CPU must be at least as new as Nehalem, which was the first CPU generation to bear the “Core” i5/i7 branding. Older CPUs will cause Illegal Instruction crashes when apps/extensions attempt to use these missing instructions.

Modern AMD CPUs also support SSE 4.2 and will work with this guide.

Continue reading Installing macOS 12 “Monterey” Developer Beta on Proxmox 6

Magic Trackpad 2 causes kernel heap corruption when passed to a Proxmox guest, GPFs

In mid-December I rebooted to upgrade my Proxmox kernel to pve-kernel-5.4.78-2-pve, but I immediately started having an issue where the kernel would trigger a GPF (general protection fault) and reset about 5-20 minutes after starting my macOS VM. I suspected that the new kernel was at fault, but I rolled back to the previous kernel and the problem persisted. I hadn’t experienced this fault before so I was a bit baffled about what change I made before that reboot could have triggered it.

To track down the issue, I built a version of Proxmox’s kernel with KASAN enabled. KASAN is the Kernel Address Sanitiser, it can detect kernel bugs like double-frees or out-of-bounds reads and writes by instrumenting the kernel to add checks around every memory access. This adds a bunch of CPU and memory space overhead, but the impact is bearable so long as your guest doesn’t need much service from the host kernel.

Continue reading Magic Trackpad 2 causes kernel heap corruption when passed to a Proxmox guest, GPFs

Working around the AMD GPU Reset bug on Proxmox using vendor-reset

Most modern AMD GPUs suffer from the AMD Reset Bug: The card cannot be reset properly, so it can only be used once per host power-on. The second time the card is tried to be used Linux will attempt to reset it and fail, causing the VM launch to fail, or the guest, host or both to hang.

This is especially a problem if you only have one GPU in your system, because it will be your primary GPU and so be initialised by the host UEFI during boot, rendering it unusable for passthrough even a single time.

gnif’s new vendor-reset project is an attempt to work around this AMD reset issue by replacing AMD’s missing FLR support with vendor-specific reset quirks.

Continue reading Working around the AMD GPU Reset bug on Proxmox using vendor-reset

Solving macOS VM kernel panics on heavily-loaded Proxmox/QEMU/KVM servers

Recently I needed to solve a problem where macOS VMs running on an overloaded Proxmox server (regularly pegged at 100% CPU, load >100) would kernel-panic and reboot about once every 15 minutes. All of the VMs on the box were running a CI workload, so Proxmox was effectively running a CPU torture-test similar to building Chrome in a loop. However, only the macOS guests were experiencing kernel panics.

Continue reading Solving macOS VM kernel panics on heavily-loaded Proxmox/QEMU/KVM servers

Installing macOS 11 “Big Sur” on Proxmox 6

macOS 12 Monterey is now available! If you want to install that instead, check out my newer guide!

This tutorial for installing macOS Big Sur using OpenCore has been adapted for Proxmox from Kholia’s OSX-KVM project and Leoyzen’s OpenCore configuration for KVM. You can get the full sourcecode on my GitHub here.

Requirements

I’ll assume you already have Proxmox 6 installed. You also need a real Mac available in order to fetch the OSK key.

Your Proxmox host computer’s CPU must support SSE 4.2, so for Intel your CPU must be at least as new as Nehalem, which was the first CPU generation to bear the “Core” i5/i7 branding. Older CPUs will cause the finder to repeatedly crash after installation completes (with an Illegal Instruction exception in the graphics code).

Modern AMD CPUs also support SSE 4.2 and will work with this guide.

Continue reading Installing macOS 11 “Big Sur” on Proxmox 6

Installing macOS Catalina 10.15 on Proxmox 6.1 or 6.2 using OpenCore

macOS 11 Big Sur has now been released! If you’d like that version instead then please use my new Big Sur installation guide!

This tutorial for installing macOS Catalina using OpenCore has been adapted for Proxmox from Kholia’s OSX-KVM project and Leoyzen’s OpenCore configuration for KVM. You can get the full sourcecode on my GitHub here.

If you’d like to use Clover instead, use my older tutorial, but OpenCore works better!

Requirements

I’ll assume you already have Proxmox 6.1 or 6.2 installed. You also need a real Mac available in order to fetch the OSK key.

Your Proxmox host computer’s CPU must support SSE 4.2, so for Intel your CPU must be at least as new as Nehalem, which was the first CPU generation to bear the “Core” i5/i7 branding. Older CPUs will cause the finder to repeatedly crash after installation completes (with an Illegal Instruction exception in the graphics code).

Modern AMD CPUs also support SSE 4.2 and will work with this guide.

Continue reading Installing macOS Catalina 10.15 on Proxmox 6.1 or 6.2 using OpenCore

createinstallmedia for macOS Sierra is a fork bomb!

Apple have posted a set of download links for installers for older versions of macOS on their website here:

https://support.apple.com/en-us/HT201372

There’s a teeny-tiny problem with the macOS Sierra installer though: running the createinstallmedia command as suggested ends up with an infinite loop of createinstallmedia spawning new copies of itself, until the computer’s resources are exhausted (a fork bomb)!

Continue reading createinstallmedia for macOS Sierra is a fork bomb!

Installing macOS Catalina 10.15 on Proxmox 6 using Clover

I’ve now created a new tutorial that uses OpenCore instead of Clover, and it fixes a lot of problems. I recommend using the new tutorial for all new builds

This tutorial for installing macOS Catalina has been adapted for Proxmox 6 from Kholia’s GitHub project for installing into vanilla KVM. There is more documentation there which will help out with enabling extra features and diagnosing problems!

If you run into trouble, also check out the comment section of my previous tutorial on Mojave – these two versions are very similar so the problems and solutions are likely to be the same.

Requirements

I’ll assume you already have Proxmox 6 installed. You also need a real Mac available in order to fetch the OSK key.

Your Proxmox host computer’s CPU must support SSE 4.2, so for Intel your CPU must be at least as new as Nehalem, which was the first CPU generation to bear the “Core” i5/i7 branding. Older CPUs will cause the finder to repeatedly crash after installation completes (with an Illegal Instruction exception in the graphics code).

Apparently modern AMD CPUs also support SSE 4.2 and can be used with this guide without any modification (maybe Bulldozer and certainly Ryzen), but I haven’t tested this myself.

Continue reading Installing macOS Catalina 10.15 on Proxmox 6 using Clover