Intel's Rocket Lake and Alder Lake CPUs are not natively supported by any OS X/macOS version and require a CPU spoof to boot, regardless of the bootloader.macOS 10.12 and newer requires an XCPM patch along with a Fake CPUID for booting into macOS.Ivy Bridge and Low-End CPUs running OS X 10.11 require a Fake CPUID and -xcpm boot flag for booting into macOS.To use these CPUs under macOS, you need to use an AVX patch. Pentium, Celeron, and Atom CPUs lack AVX instructions which is required for booting OS X/macOS.In addition, for Dual Socket CPU users, you will need to use AppleMCEReporterDisabler in macOS Catalina. Dual Socket CPUs are supported with up to a maximum of 64 threads.Any prior CPU will lack VT-d feature even if provided by Intel. CPUs from 2012 are supported by Apple's VT-d function.Dual Socket users using MacPro6,1, MacPro7,1, or iMacPro1,1 SMBIOS will need to use AppleMCEReporterDisabler in macOS Catalina 10.15 and later.OS X 10.11 and newer supports up to a maximum of 64 threads which means you cannot use a CPU with more than 32 Cores, including Dual CPUs.OS X 10.10 and older supports up to a maximum of 24 threads which means you cannot use a CPU with more than 12 Cores, including Dual CPUs.The general limitations apply to both, Intel and AMD CPUs For more info on CPU Limitations, see below. This is due to the limited amount of CPU Apple supports, so we're either limited by Apple or the patches community has created.
With macOS, there are numerous CPU limitations you need to be aware of before buying a CPU or stepping into an installation as that would be a waste of time and resources, together. SSE4.1 CPUs also supports macOS 12.0 (Current) with TELEMETRAP.64-bit versions of OS X & macOS requires SSSE3.Intel versions of OS X & macOS requires SSE3.CPUs with 64-bit architecture supports OS X 10.4.1 To macOS 12.0 (Current).CPUs with 32-bit architecture only support OS X 10.4.1 to 10.6.8.OS X & macOS support all CPUs till date, starting from Pentium 4.
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