Probably can't run Ventura yet. A first gen i7 or a Q6600 doesn't support AVX 2 instructions. AVX 2 expands most integer commands to 256 bits and introduces new instructions. They were first supported by Intel with the Haswell processor, which shipped in 2013. See the following from Github OCLP page.
Removal of pre-AVX2.0 dyld shared cache
With the discontinuation of OS support for the MacPro6,1 (Trash Can), Apple no longer has any reason to retain pre-Haswell support in macOS. This means that important parts of macOS, namely the dyld shared cache, no longer ship a non-AVX2.0 variant on Intel.
This page will be updated as we learn more about Ventura and the changes within. If you're not an active developer for legacy Macs, DO NOT INSTALL VENTURA. Even if you're bored, more random users i...
github.com