Haven't done an actual post about my success with this build, but here it is. Used the normal update process for MacOS and it downloaded, updated, restarted a few times, and rebooted normally into 14.5. Side note: everything works except things like Sidecar, Universal Control, etc. Also, my 10Gb Solarflare adapter (Solarflare10GbE.kext v3.3.4 via OC) causes random resets while sleeping. With this CPU, it seems that it's not possible to get full performance unless you use iMacPro1,1. If anyone has any insight on those, I'm all ears.

Hardware:

• Mobo: Asus TUF GAMING Z790-PLUS WIFI
• CPU: Intel i9-14900K
• Storage: SAMSUNG 990 PRO Series - 2TB PCIe Gen4 NVMe
• Memory: CORSAIR VENGEANCE DDR5 RAM 128GB (4x32GB) 5600MHz CL40
• PCIe NIC: Solarflare 10GbE dual SFP NIC
• GPU: Asus AMD Radeon RX 6600