2013 Mac Pro and macOS Ventura Boot Issues

[khronokernel]

As discussed previously in the overall macOS Ventura and OpenCore Legacy Patcher Support Issue, certain units, namely the 2013 Mac Pro, fail to boot macOS Ventura due to a mixture of several issues including a likely GPU memory mapping issue.

Currently we've been able to mostly alleviate issues on some machines, ex. iMac8,1, however we've yet to properly diagnose and restore boot support to 2013 Mac Pro units. More information on the issue and some findings are below:

• Ventura Boot Issues with certain GPU/Firmware combinations #2126

As we once had previously with the 2014 5k iMac series on macOS Monterey, we're graciously asking the community for a hardware donation of the 2013 Mac Pro. We've been working diligently for months on this issue remotely with some patient testers, however the scope of this issue has made is quite difficult to properly debug and develop patches for these systems.

For an applicable machine, we only need a stock 2013 Mac Pro (MacPro6,1). Ideally completely functional including both dGPUs, this is to ensure that there are no GMUX issues relating to a faulty card. If you have such a machine, you can email me at the following:

• Thanks to a gracious user, we've gotten a 2013 Mac Pro donated, thank you to everyone who's reached out. Once machine arrives, we'll be working closely on resolving this issue.

While we cannot promise a quick, working solution, I can assure you we'll be putting in all our effort into trying to resolve this issue.

[khronokernel]

As per commit 72464f3, we've added early support for the 2013 Mac Pro. Currently power management is still broken (namely no idle clock speed), however otherwise machine is mostly functional.

0.5.1 should add support MacPro6,1, and subsequent releases will hopefully improve upon the remaining quirks.

Currently the following need resolving:

• CPU Power Management
  • Low Power Mode
• GPU Encode/Decode (related to overall Legacy GCN support for Macs)
  • AppleTV+ rendering issues

[khronokernel]

Low power mode has been resolved with the latest commit: c414c9c

Closing issue as MacPro6,1 specific issues have finally been resolved. For graphics, see general legacy Metal issues