Also, ChatGPT seems ambivalent about it -
"However, it is worth noting that modern operating systems like macOS have built-in protections to prevent user-level programs from accessing sensitive system resources, which can help mitigate the impact of a segmentation fault.
In summary, running a faulty program written in C language that crashes with a segmentation fault can potentially cause system stability issues on a Mac, but the exact impact will depend on a variety of factors. It is generally a good practice to test and debug programs thoroughly before running them on any system, especially if they involve sensitive or critical resources."